acromion vs outgrowth

acromion and outgrowth both are nouns.

Word	Noun	Adjective	Verb	Adverb
acromion	Yes	No	No	No
outgrowth	Yes	No	No	No

As nouns, outgrowth is a hypernym of acromion; that is, outgrowth is a word with a broader meaning than acromion:

acromion: the outermost point of the spine of the shoulder blade
outgrowth: a natural prolongation or projection from a part of an organism either animal or plant

Other hypernyms of acromion include appendage, process.

acromion (noun)	outgrowth (noun)
the outermost point of the spine of the shoulder blade	a natural prolongation or projection from a part of an organism either animal or plant
	the gradual beginning or coming forth
	a natural consequence of development