metopion vs craniometric point

metopion and craniometric point both are nouns.

Word	Noun	Adjective	Verb	Adverb
metopion	Yes	No	No	No
craniometric point	Yes	No	No	No

As nouns, craniometric point is a hypernym of metopion; that is, craniometric point is a word with a broader meaning than metopion:

metopion: the craniometric point midway between the frontal eminences of the skull
craniometric point: a landmark on the skull from which craniometric measurements can be taken

metopion (noun)	craniometric point (noun)
the craniometric point midway between the frontal eminences of the skull	a landmark on the skull from which craniometric measurements can be taken