staghead vs tussock

staghead and tussock both are nouns.

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

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

staghead: an abnormal tufted growth of small branches on a tree or shrub caused by fungi or insects or other physiological disturbance
tussock: a bunch of hair or feathers or growing grass

Other hypernyms of staghead include tuft.

staghead (noun)	tussock (noun)
an abnormal tufted growth of small branches on a tree or shrub caused by fungi or insects or other physiological disturbance	a bunch of hair or feathers or growing grass