curtsey vs curtsy

curtsey and curtsy both are nouns.

Word	Noun	Adjective	Verb	Adverb
curtsey	Yes	No	Yes	No
curtsy	Yes	No	Yes	No

As nouns, curtsey and curtsy are synonyms defined as:

curtsey and curtsy: bending the knees; a gesture of respect made by women

As verbs, curtsey and curtsy are synonyms defined as:

curtsey (noun)	curtsy (noun)
bending the knees; a gesture of respect made by women	bending the knees; a gesture of respect made by women

curtsey (verb)	curtsy (verb)
bend the knees in a gesture of respectful greeting	make a curtsy; usually done only by girls and women; as a sign of respect
	bend the knees in a gesture of respectful greeting