mononuclear phagocyte system vs MPS

mononuclear phagocyte system and MPS both are nouns.

Word	Noun	Adjective	Verb	Adverb
mononuclear phagocyte system	Yes	No	No	No
MPS	Yes	No	No	No

As nouns, mononuclear phagocyte system and MPS are synonyms defined as:

mononuclear phagocyte system and MPS: a widely distributed system of free and fixed macrophages derived from bone marrow

Other synonyms of mononuclear phagocyte system include system of macrophages.

mononuclear phagocyte system (noun)	MPS (noun)
a widely distributed system of free and fixed macrophages derived from bone marrow	a widely distributed system of free and fixed macrophages derived from bone marrow