gin mill vs alehouse

gin mill and alehouse both are nouns.

Word	Noun	Adjective	Verb	Adverb
gin mill	Yes	No	No	No
alehouse	Yes	No	No	No

As nouns, alehouse is a hyponym of gin mill; that is, alehouse is a word with a more specific, narrower meaning than gin mill:

gin mill: tavern consisting of a building with a bar and public rooms; often provides light meals
alehouse: a tavern where ale is sold

Other hyponyms of gin mill include free house.

gin mill (noun)	alehouse (noun)
tavern consisting of a building with a bar and public rooms; often provides light meals	a tavern where ale is sold