lacrimal bone vs os

lacrimal bone and os both are nouns.

Word	Noun	Adjective	Verb	Adverb
lacrimal bone	Yes	No	No	No
os	Yes	No	No	No

As nouns, os is a hypernym of lacrimal bone; that is, os is a word with a broader meaning than lacrimal bone:

lacrimal bone: small fragile bone making up part of the front inner walls of each eye socket and providing room for the passage of the lacrimal ducts
os: rigid connective tissue that makes up the skeleton of vertebrates

Other hypernyms of lacrimal bone include bone.

lacrimal bone (noun)	os (noun)
small fragile bone making up part of the front inner walls of each eye socket and providing room for the passage of the lacrimal ducts	rigid connective tissue that makes up the skeleton of vertebrates
	a mouth or mouthlike opening