sex vs excite

sex is a noun but excite is not a noun.

Word	Noun	Adjective	Verb	Adverb
sex	Yes	No	Yes	No
excite	No	No	Yes	No

As verbs, sex and excite are synonyms defined as:

Other synonyms of sex include arouse, turn on, wind up.

As verbs, excite is a hypernym of sex; that is, excite is a word with a broader meaning than sex:

Other hypernyms of sex include shake, shake up, stimulate, stir.

sex (noun)	excite (noun)
activities associated with sexual intercourse
the properties that distinguish organisms on the basis of their reproductive roles
all of the feelings resulting from the urge to gratify sexual impulses
either of the two categories (male or female) into which most organisms are divided

sex (verb)	excite (verb)
tell the sex (of young chickens)	act as a stimulant
to evoke sexual feelings	produce a magnetic field in
	raise to a higher energy level
	stir the feelings, emotions, or peace of
	to evoke sexual feelings
	arouse or elicit a feeling
	cause to be agitated, excited, or roused
	stir feelings in