diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Revision history for ebird-api
 
+## 0.2.0.0 -- 2023-12-16
+
+* Rename subregion items so subregion is one word.
+
 ## 0.1.0.0 -- 2023-07-30
 
 * First version. Released on an unsuspecting world.
diff --git a/ebird-api.cabal b/ebird-api.cabal
--- a/ebird-api.cabal
+++ b/ebird-api.cabal
@@ -1,6 +1,6 @@
 cabal-version:      3.0
 name:               ebird-api
-version:            0.1.0.0
+version:            0.2.0.0
 synopsis:
     A Haskell description of the eBird API
 description:
diff --git a/src/Data/EBird/API.hs b/src/Data/EBird/API.hs
--- a/src/Data/EBird/API.hs
+++ b/src/Data/EBird/API.hs
@@ -87,7 +87,7 @@
     -- section](https://documenter.getpostman.com/view/664302/S1ENwy59#c9947c5c-2dce-4c6d-9911-7d702235506c)
     -- of the eBird API documentation.
   , RegionInfoAPI
-  , SubRegionListAPI
+  , SubregionListAPI
   , AdjacentRegionsAPI
 
     -- * eBird checklists
@@ -194,7 +194,7 @@
 
     -- Region APIs
     :<|> RegionInfoAPI
-    :<|> SubRegionListAPI
+    :<|> SubregionListAPI
     :<|> AdjacentRegionsAPI
 
 -- | Convenient synonym for requiring an @x-ebirdapitoken@ on a route
@@ -572,7 +572,7 @@
 --
 -- See the [eBird API documentation for this
 -- route](https://documenter.getpostman.com/view/664302/S1ENwy59#382da1c8-8bff-4926-936a-a1f8b065e7d5).
-type SubRegionListAPI =
+type SubregionListAPI =
     "v2" :> "ref" :> "region"
     :> "list"
     :> WithAPIKey
diff --git a/src/Data/EBird/API/Regions.hs b/src/Data/EBird/API/Regions.hs
--- a/src/Data/EBird/API/Regions.hs
+++ b/src/Data/EBird/API/Regions.hs
@@ -123,7 +123,7 @@
       }
   deriving (Show, Read, Eq)
 
--- | The data structure returned by the eBird 'Data.EBird.API.SubRegionListAPI' and
+-- | The data structure returned by the eBird 'Data.EBird.API.SubregionListAPI' and
 -- 'Data.EBird.API.AdjacentRegionsAPI'.
 data RegionListEntry =
     RegionListEntry