beauty salon vs beauty parlor

beauty salon and beauty parlor both are nouns.

Word	Noun	Adjective	Verb	Adverb
beauty salon	Yes	No	No	No
beauty parlor	Yes	No	No	No

As nouns, beauty salon and beauty parlor are synonyms defined as:

beauty salon and beauty parlor: a shop where hairdressers and beauticians work

Other synonyms of beauty salon include beauty parlour, beauty shop, salon.

beauty salon (noun)	beauty parlor (noun)
a shop where hairdressers and beauticians work	a shop where hairdressers and beauticians work