bridesmaid vs woman

bridesmaid and woman both are nouns.

Word	Noun	Adjective	Verb	Adverb
bridesmaid	Yes	No	No	No
woman	Yes	No	No	No

As nouns, woman is a hypernym of bridesmaid; that is, woman is a word with a broader meaning than bridesmaid:

Other hypernyms of bridesmaid include attendant, attender, tender, adult female.

bridesmaid (noun)	woman (noun)
an unmarried woman who attends the bride at a wedding	women as a class
	an adult female person (as opposed to a man)
	a female person who plays a significant role (wife or mistress or girlfriend) in the life of a particular man