tap house vs pothouse

tap house and pothouse both are nouns.

Word	Noun	Adjective	Verb	Adverb
tap house	Yes	No	No	No
pothouse	Yes	No	No	No

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

tap house: 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 tap house include beer garden, bucket shop, gin mill, pub, public house, saloon, taphouse, rathskeller, shebeen.

tap house (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