gentlewoman vs lady

gentlewoman and lady both are nouns.

Word	Noun	Adjective	Verb	Adverb
gentlewoman	Yes	No	No	No
lady	Yes	No	No	No

As nouns, gentlewoman and lady are synonyms defined as:

Other synonyms of gentlewoman include dame, ma'am, madam.

gentlewoman (noun)	lady (noun)
a woman of refinement	a woman of refinement
	a polite name for any woman