Buddha vs saint

Buddha and saint both are nouns.

Word	Noun	Adjective	Verb	Adverb
Buddha	Yes	No	No	No
saint	Yes	No	Yes	No

As nouns, saint is a hypernym of Buddha; that is, saint is a word with a broader meaning than Buddha:

Other hypernyms of Buddha include angel, holy man, holy person.

Buddha (noun)	saint (noun)
founder of Buddhism (c 563-483 BC)	person of exceptional holiness
one who has achieved a state of perfect enlightenment	model of excellence or perfection of a kind; one having no equal
	a person who has died and has been declared a saint by canonization

Buddha (verb)	saint (verb)
	declare (a dead person) to be a saint
	hold sacred