beauty parlor vs beauty salon

beauty parlor and beauty salon both are nouns.

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

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

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

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

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