teahouse vs tea parlor

teahouse and tea parlor both are nouns.

Word	Noun	Adjective	Verb	Adverb
teahouse	Yes	No	No	No
tea parlor	Yes	No	No	No

As nouns, teahouse and tea parlor are synonyms defined as:

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

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

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