carina fornicis vs carina

carina fornicis and carina both are nouns.

Word	Noun	Adjective	Verb	Adverb
carina fornicis	Yes	No	No	No
carina	Yes	No	No	No

As nouns, carina is a hypernym of carina fornicis; that is, carina is a word with a broader meaning than carina fornicis:

carina fornicis: ridge on the lower surface of the fornix of the brain
carina: any of various keel-shaped structures or ridges such as that on the breastbone of a bird or that formed by the fused petals of a pea blossom

carina fornicis (noun)	carina (noun)
ridge on the lower surface of the fornix of the brain	any of various keel-shaped structures or ridges such as that on the breastbone of a bird or that formed by the fused petals of a pea blossom