bachelorette vs woman

bachelorette and woman both are nouns.

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

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

Other hypernyms of bachelorette include adult female.

bachelorette (noun)	woman (noun)
a young unmarried woman who lives alone	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