MPS vs mononuclear phagocyte system

MPS and mononuclear phagocyte system both are nouns.

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

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

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

Other synonyms of MPS include system of macrophages.

MPS (noun)	mononuclear phagocyte system (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