diff --git a/Cargo.lock b/Cargo.lock
index e7b1b73..ea264ca 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1095,7 +1095,7 @@ checksum = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
 name = "varcon"
 version = "0.2.1"
 dependencies = [
- "enumflags2",
+ "varcon-core",
 ]
 
 [[package]]
@@ -1104,13 +1104,14 @@ version = "1.0.2"
 dependencies = [
  "codegenrs",
  "structopt",
- "varcon-parser",
+ "varcon-core",
 ]
 
 [[package]]
-name = "varcon-parser"
+name = "varcon-core"
 version = "1.0.0"
 dependencies = [
+ "enumflags2",
  "nom",
 ]
 
diff --git a/Cargo.toml b/Cargo.toml
index e32fbc9..bc011ad 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,7 @@ members = [
     "crates/codespell-dict", "crates/codespell-dict/codegen",
     "crates/misspell-dict", "crates/misspell-dict/codegen",
     "crates/wikipedia-dict", "crates/wikipedia-dict/codegen",
-    "crates/varcon", "crates/varcon/codegen", "crates/varcon-parser",
+    "crates/varcon", "crates/varcon/codegen", "crates/varcon-core",
 ]
 
 [package]
diff --git a/crates/varcon-parser/Cargo.toml b/crates/varcon-core/Cargo.toml
similarity index 54%
rename from crates/varcon-parser/Cargo.toml
rename to crates/varcon-core/Cargo.toml
index 64d784d..2b5ab2d 100644
--- a/crates/varcon-parser/Cargo.toml
+++ b/crates/varcon-core/Cargo.toml
@@ -1,8 +1,8 @@
 [package]
-name = "varcon-parser"
+name = "varcon-core"
 version = "1.0.0"
 authors = ["Ed Page <eopage@gmail.com>"]
-description = "Parse varcon.txt file"
+description = "Varcon-relevant data structures"
 repository = "https://github.com/crate-ci/typos"
 readme = "../../../README.md"
 categories = ["text-processing"]
@@ -13,5 +13,14 @@ edition = "2018"
 azure-devops = { project = "crate-ci", pipeline = "typos" }
 codecov = { repository = "crate-ci/typos" }
 
+[features]
+default = []
+parser = ["nom"]
+flags = ["enumflags2"]
+
 [dependencies]
-nom = "5.1.1"
+nom = { version = "5.1.1", optional = true }
+enumflags2 = { version = "0.6", optional = true }
+
+[package.metadata.docs.rs]
+features = [ "parser", "flags" ]
diff --git a/crates/varcon-core/src/borrowed.rs b/crates/varcon-core/src/borrowed.rs
new file mode 100644
index 0000000..937c5dc
--- /dev/null
+++ b/crates/varcon-core/src/borrowed.rs
@@ -0,0 +1,54 @@
+#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
+pub struct Cluster {
+    pub header: Option<&'static str>,
+    pub entries: &'static [Entry],
+    pub notes: &'static [&'static str],
+}
+
+impl Cluster {
+    pub fn into_owned(self) -> crate::Cluster {
+        crate::Cluster {
+            header: self.header.map(|s| s.to_owned()),
+            entries: self.entries.iter().map(|s| s.into_owned()).collect(),
+            notes: self.notes.iter().map(|s| (*s).to_owned()).collect(),
+        }
+    }
+}
+
+#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
+pub struct Entry {
+    pub variants: &'static [Variant],
+    pub pos: Option<crate::Pos>,
+    pub archaic: bool,
+    pub note: bool,
+    pub description: Option<&'static str>,
+    pub comment: Option<&'static str>,
+}
+
+impl Entry {
+    pub fn into_owned(self) -> crate::Entry {
+        crate::Entry {
+            variants: self.variants.iter().map(|v| v.into_owned()).collect(),
+            pos: self.pos,
+            archaic: self.archaic,
+            note: self.note,
+            description: self.description.map(|s| s.to_owned()),
+            comment: self.comment.map(|s| s.to_owned()),
+        }
+    }
+}
+
+#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
+pub struct Variant {
+    pub types: &'static [crate::Type],
+    pub word: &'static str,
+}
+
+impl Variant {
+    pub fn into_owned(self) -> crate::Variant {
+        crate::Variant {
+            types: self.types.iter().copied().collect(),
+            word: self.word.to_owned(),
+        }
+    }
+}
diff --git a/crates/varcon-parser/src/lib.rs b/crates/varcon-core/src/lib.rs
similarity index 66%
rename from crates/varcon-parser/src/lib.rs
rename to crates/varcon-core/src/lib.rs
index 76c341d..7efd721 100644
--- a/crates/varcon-parser/src/lib.rs
+++ b/crates/varcon-core/src/lib.rs
@@ -1,6 +1,10 @@
+pub mod borrowed;
+
+#[cfg(feature = "parser")]
 mod parser;
 
-pub use parser::ClusterIter;
+#[cfg(feature = "parser")]
+pub use crate::parser::ClusterIter;
 
 #[derive(Clone, PartialEq, Eq, Hash, Debug)]
 pub struct Cluster {
@@ -72,7 +76,7 @@ pub struct Variant {
     pub word: String,
 }
 
-#[derive(Clone, PartialEq, Eq, Hash, Debug)]
+#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
 pub struct Type {
     pub category: Category,
     pub tag: Option<Tag>,
@@ -80,28 +84,43 @@ pub struct Type {
 }
 
 #[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
+#[cfg_attr(feature = "flags", derive(enumflags2::BitFlags))]
+#[repr(u8)]
 pub enum Category {
-    American,
-    BritishIse,
-    BritishIze,
-    Canadian,
-    Australian,
-    Other,
+    American = 0x01,
+    BritishIse = 0x02,
+    BritishIze = 0x04,
+    Canadian = 0x08,
+    Australian = 0x10,
+    Other = 0x20,
 }
 
-#[derive(Copy, Clone, PartialEq, Eq, Hash, PartialOrd, Ord, Debug)]
+#[cfg(feature = "flags")]
+pub type CategorySet = enumflags2::BitFlags<Category>;
+
+#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
+#[cfg_attr(feature = "flags", derive(enumflags2::BitFlags))]
+#[repr(u8)]
 pub enum Tag {
-    Eq,
-    Variant,
-    Seldom,
-    Possible,
-    Improper,
+    Eq = 0x01,
+    Variant = 0x02,
+    Seldom = 0x04,
+    Possible = 0x08,
+    Improper = 0x10,
 }
 
+#[cfg(feature = "flags")]
+pub type TagSet = enumflags2::BitFlags<Tag>;
+
 #[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
+#[cfg_attr(feature = "flags", derive(enumflags2::BitFlags))]
+#[repr(u8)]
 pub enum Pos {
-    Noun,
-    Verb,
-    Adjective,
-    Adverb,
+    Noun = 0x01,
+    Verb = 0x02,
+    Adjective = 0x04,
+    Adverb = 0x08,
 }
+
+#[cfg(feature = "flags")]
+pub type PosSet = enumflags2::BitFlags<Pos>;
diff --git a/crates/varcon-parser/src/parser.rs b/crates/varcon-core/src/parser.rs
similarity index 100%
rename from crates/varcon-parser/src/parser.rs
rename to crates/varcon-core/src/parser.rs
diff --git a/crates/varcon/Cargo.toml b/crates/varcon/Cargo.toml
index e8bbb7f..31d6c46 100644
--- a/crates/varcon/Cargo.toml
+++ b/crates/varcon/Cargo.toml
@@ -17,7 +17,7 @@ codecov = { repository = "crate-ci/typos" }
 [features]
 default = ["all"]
 all = ["flags"]
-flags = ["enumflags2"]
+flags = ["varcon-core/flags"]
 
 [dependencies]
-enumflags2 = { version = "0.6", optional = true }
+varcon-core = { version = "1.0", path = "../varcon-core" }
diff --git a/crates/varcon/codegen/Cargo.toml b/crates/varcon/codegen/Cargo.toml
index c7eeefb..7e808e4 100644
--- a/crates/varcon/codegen/Cargo.toml
+++ b/crates/varcon/codegen/Cargo.toml
@@ -17,4 +17,4 @@ codecov = { repository = "crate-ci/typos" }
 [dependencies]
 codegenrs = "0.1"
 structopt = "0.3"
-varcon-parser = { version = "1.0", path = "../../varcon-parser" }
+varcon-core = { version = "1.0", path = "../../varcon-core", features = ["parser"] }
diff --git a/crates/varcon/codegen/src/main.rs b/crates/varcon/codegen/src/main.rs
index 43721d0..524472e 100644
--- a/crates/varcon/codegen/src/main.rs
+++ b/crates/varcon/codegen/src/main.rs
@@ -4,7 +4,7 @@ const DICT: &[u8] = include_bytes!("../../assets/varcon.txt");
 
 fn generate<W: std::io::Write>(file: &mut W) {
     let dict = String::from_utf8_lossy(DICT);
-    let clusters = varcon_parser::ClusterIter::new(&dict);
+    let clusters = varcon_core::ClusterIter::new(&dict);
 
     writeln!(
         file,
diff --git a/crates/varcon/src/lib.rs b/crates/varcon/src/lib.rs
index bb4be6b..8fbf870 100644
--- a/crates/varcon/src/lib.rs
+++ b/crates/varcon/src/lib.rs
@@ -1,75 +1,16 @@
 mod codegen;
 
 pub use codegen::*;
-
-#[derive(Clone, PartialEq, Eq, Hash, Debug)]
-pub struct Cluster {
-    pub header: Option<&'static str>,
-    pub entries: &'static [Entry],
-    pub notes: &'static [&'static str],
-}
-
-#[derive(Clone, PartialEq, Eq, Hash, Debug)]
-pub struct Entry {
-    pub variants: &'static [Variant],
-    pub pos: Option<Pos>,
-    pub archaic: bool,
-    pub note: bool,
-    pub description: Option<&'static str>,
-    pub comment: Option<&'static str>,
-}
-
-#[derive(Clone, PartialEq, Eq, Hash, Debug)]
-pub struct Variant {
-    pub types: &'static [Type],
-    pub word: &'static str,
-}
-
-#[derive(Clone, PartialEq, Eq, Hash, Debug)]
-pub struct Type {
-    pub category: Category,
-    pub tag: Option<Tag>,
-    pub num: Option<usize>,
-}
-
-#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
-#[cfg_attr(feature = "flags", derive(enumflags2::BitFlags))]
-#[repr(u8)]
-pub enum Category {
-    American = 0x01,
-    BritishIse = 0x02,
-    BritishIze = 0x04,
-    Canadian = 0x08,
-    Australian = 0x10,
-    Other = 0x20,
-}
-
+pub use varcon_core::borrowed::Cluster;
+pub use varcon_core::borrowed::Entry;
+pub use varcon_core::borrowed::Variant;
+pub use varcon_core::Category;
 #[cfg(feature = "flags")]
-pub type CategorySet = enumflags2::BitFlags<Category>;
-
-#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
-#[cfg_attr(feature = "flags", derive(enumflags2::BitFlags))]
-#[repr(u8)]
-pub enum Tag {
-    Eq = 0x01,
-    Variant = 0x02,
-    Seldom = 0x04,
-    Possible = 0x08,
-    Improper = 0x10,
-}
-
+pub use varcon_core::CategorySet;
+pub use varcon_core::Pos;
 #[cfg(feature = "flags")]
-pub type TagSet = enumflags2::BitFlags<Tag>;
-
-#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
-#[cfg_attr(feature = "flags", derive(enumflags2::BitFlags))]
-#[repr(u8)]
-pub enum Pos {
-    Noun = 0x01,
-    Verb = 0x02,
-    Adjective = 0x04,
-    Adverb = 0x08,
-}
-
+pub use varcon_core::PosSet;
+pub use varcon_core::Tag;
 #[cfg(feature = "flags")]
-pub type PosSet = enumflags2::BitFlags<Pos>;
+pub use varcon_core::TagSet;
+pub use varcon_core::Type;