frontal eminence vs extrusion

frontal eminence and extrusion both are nouns.

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

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

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

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

frontal eminence (noun)	extrusion (noun)
either prominence of the frontal bone above each orbit	squeezing out by applying pressure
	something that bulges out or is protuberant or projects from its surroundings