public house vs pothouse

public house and pothouse both are nouns.

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

As nouns, public house and pothouse are synonyms defined as:

public house and pothouse: tavern consisting of a building with a bar and public rooms; often provides light meals

Other synonyms of public house include gin mill, pub, saloon, taphouse.

public house (noun)	pothouse (noun)
tavern consisting of a building with a bar and public rooms; often provides light meals	tavern consisting of a building with a bar and public rooms; often provides light meals