macrophage vs scavenger cell

macrophage and scavenger cell both are nouns.

Word	Noun	Adjective	Verb	Adverb
macrophage	Yes	No	No	No
scavenger cell	Yes	No	No	No

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

macrophage: a large phagocyte; some are fixed and other circulate in the blood stream
scavenger cell: a cell that engulfs and digests debris and invading microorganisms

Other hypernyms of macrophage include phagocyte.

macrophage (noun)	scavenger cell (noun)
a large phagocyte; some are fixed and other circulate in the blood stream	a cell that engulfs and digests debris and invading microorganisms