banzai vs cheer

banzai and cheer both are nouns.

Word	Noun	Adjective	Verb	Adverb
banzai	Yes	No	No	No
cheer	Yes	No	Yes	No

As nouns, cheer is a hypernym of banzai; that is, cheer is a word with a broader meaning than banzai:

banzai (noun)	cheer (noun)
a Japanese cheer of enthusiasm or triumph	the quality of being cheerful and dispelling gloom
	a cry or shout of approval

banzai (verb)	cheer (verb)
	become cheerful
	spur on or encourage especially by cheers and shouts
	show approval or good wishes by shouting
	cause (somebody) to feel happier or more cheerful
	give encouragement to