tussock vs staghead

tussock and staghead both are nouns.

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

As nouns, staghead is a hyponym of tussock; that is, staghead is a word with a more specific, narrower meaning than tussock:

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

Other hyponyms of tussock include wisp, hexenbesen, witch broom, witches' broom, coma.

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