tussock vs bunch

tussock and bunch both are nouns.

Word	Noun	Adjective	Verb	Adverb
tussock	Yes	No	No	No
bunch	Yes	No	Yes	No

As nouns, bunch is a hypernym of tussock; that is, bunch is a word with a broader meaning than tussock:

Other hypernyms of tussock include clump, cluster, clustering.

tussock (noun)	bunch (noun)
a bunch of hair or feathers or growing grass	a grouping of a number of similar things
	an informal body of friends
	any collection in its entirety

tussock (verb)	bunch (verb)
	gather or cause to gather into a cluster
	form into a bunch