chat vs wood warbler

chat and wood warbler both are nouns.

Word	Noun	Adjective	Verb	Adverb
chat	Yes	No	Yes	No
wood warbler	Yes	No	No	No

As nouns, wood warbler is a hypernym of chat; that is, wood warbler is a word with a broader meaning than chat:

chat: birds having a chattering call
wood warbler: small bright-colored American songbird with a weak unmusical song

Other hypernyms of chat include New World warbler.

chat (noun)	wood warbler (noun)
songbirds having a chattering call	small bright-colored American songbird with a weak unmusical song
birds having a chattering call	European woodland warbler with dull yellow plumage
an informal conversation

chat (verb)	wood warbler (verb)
talk socially without exchanging too much information