tavern vs pothouse

tavern and pothouse both are nouns.

Word	Noun	Adjective	Verb	Adverb
tavern	Yes	No	No	No
pothouse	Yes	No	No	No

As nouns, pothouse is a hyponym of tavern; that is, pothouse is a word with a more specific, narrower meaning than tavern:

tavern: a building with a bar that is licensed to sell alcoholic drinks
pothouse: tavern consisting of a building with a bar and public rooms; often provides light meals

Other hyponyms of tavern include beer garden, bucket shop, gin mill, pub, public house, saloon, taphouse, rathskeller, shebeen.

tavern (noun)	pothouse (noun)
a building with a bar that is licensed to sell alcoholic drinks	tavern consisting of a building with a bar and public rooms; often provides light meals