curtsy vs greet

curtsy is a noun but greet is not a noun.

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

As verbs, greet is a hypernym of curtsy; that is, greet is a word with a broader meaning than curtsy:

curtsy: make a curtsy; usually done only by girls and women; as a sign of respect
greet: express greetings upon meeting someone

Other hypernyms of curtsy include recognise, recognize.

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

curtsy (verb)	greet (verb)
make a curtsy; usually done only by girls and women; as a sign of respect	react to in a certain way
bend the knees in a gesture of respectful greeting	express greetings upon meeting someone
	send greetings to
	be perceived by