kat vs excitant

kat and excitant both are nouns.

Word	Noun	Adjective	Verb	Adverb
kat	Yes	No	No	No
excitant	Yes	Yes	No	No

As nouns, excitant is a hypernym of kat; that is, excitant is a word with a broader meaning than kat:

kat: the leaves of the shrub Catha edulis which are chewed like tobacco or used to make tea; has the effect of a euphoric stimulant
excitant: a drug that temporarily quickens some vital process

Other hypernyms of kat include stimulant, stimulant drug.

kat (noun)	excitant (noun)
the leaves of the shrub Catha edulis which are chewed like tobacco or used to make tea; has the effect of a euphoric stimulant	a drug that temporarily quickens some vital process

kat (adjective)	excitant (adjective)
	(of drugs e.g.) able to excite or stimulate