zygomatic process vs outgrowth

zygomatic process and outgrowth both are nouns.

Word	Noun	Adjective	Verb	Adverb
zygomatic process	Yes	No	No	No
outgrowth	Yes	No	No	No

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

zygomatic process: a slender process of the temporal bone that strengthens the zygomatic arch
outgrowth: a natural prolongation or projection from a part of an organism either animal or plant

Other hypernyms of zygomatic process include appendage, process.

zygomatic process (noun)	outgrowth (noun)
a slender process of the temporal bone that strengthens the zygomatic arch	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