caput vs human head

caput and human head both are nouns.

Word	Noun	Adjective	Verb	Adverb
caput	Yes	No	No	No
human head	Yes	No	No	No

As nouns, human head is a hyponym of caput; that is, human head is a word with a more specific, narrower meaning than caput:

caput: the upper part of the human body or the front part of the body in animals; contains the face and brains
human head: the head of a human being

caput (noun)	human head (noun)
the upper part of the human body or the front part of the body in animals; contains the face and brains	the head of a human being
a headlike protuberance on an organ or structure