osteoclast vs bone cell

osteoclast and bone cell both are nouns.

Word	Noun	Adjective	Verb	Adverb
osteoclast	Yes	No	No	No
bone cell	Yes	No	No	No

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

osteoclast: cell that functions in the breakdown and resorption of bone tissue
bone cell: a cell that is part of a bone

osteoclast (noun)	bone cell (noun)
cell that functions in the breakdown and resorption of bone tissue	a cell that is part of a bone