teahouse vs tearoom

teahouse and tearoom both are nouns.

Word	Noun	Adjective	Verb	Adverb
teahouse	Yes	No	No	No
tearoom	Yes	No	No	No

As nouns, teahouse and tearoom are synonyms defined as:

teahouse and tearoom: a restaurant where tea and light meals are available

Other synonyms of teahouse include tea parlor, tea parlour, teashop.

teahouse (noun)	tearoom (noun)
a restaurant where tea and light meals are available	a restaurant where tea and light meals are available