Cornish fowl vs Cornish

Cornish fowl and Cornish both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cornish fowl	Yes	No	No	No
Cornish	Yes	Yes	No	No

As nouns, Cornish fowl and Cornish are synonyms defined as:

Cornish fowl and Cornish: English breed of compact domestic fowl; raised primarily to crossbreed to produce roasters

Cornish fowl (noun)	Cornish (noun)
English breed of compact domestic fowl; raised primarily to crossbreed to produce roasters	English breed of compact domestic fowl; raised primarily to crossbreed to produce roasters
	a Celtic language spoken in Cornwall

Cornish fowl (adjective)	Cornish (adjective)
	of or related to Cornwall or its people or the Cornish language