frontal eminence vs excrescence

frontal eminence and excrescence both are nouns.

Word	Noun	Adjective	Verb	Adverb
frontal eminence	Yes	No	No	No
excrescence	Yes	No	No	No

As nouns, excrescence is a hypernym of frontal eminence; that is, excrescence is a word with a broader meaning than frontal eminence:

frontal eminence: either prominence of the frontal bone above each orbit
excrescence: something that bulges out or is protuberant or projects from its surroundings

Other hypernyms of frontal eminence include bulge, bump, extrusion, gibbosity, gibbousness, hump, jut, prominence, protrusion, protuberance, swelling.

frontal eminence (noun)	excrescence (noun)
either prominence of the frontal bone above each orbit	(pathology) an abnormal outgrowth or enlargement of some part of the body
	something that bulges out or is protuberant or projects from its surroundings