RBC vs erythrocyte

RBC and erythrocyte both are nouns.

Word	Noun	Adjective	Verb	Adverb
RBC	Yes	No	No	No
erythrocyte	Yes	No	No	No

As nouns, RBC and erythrocyte are synonyms defined as:

RBC and erythrocyte: a mature blood cell that contains hemoglobin to carry oxygen to the bodily tissues; a biconcave disc that has no nucleus

Other synonyms of RBC include red blood cell.

RBC (noun)	erythrocyte (noun)
a mature blood cell that contains hemoglobin to carry oxygen to the bodily tissues; a biconcave disc that has no nucleus	a mature blood cell that contains hemoglobin to carry oxygen to the bodily tissues; a biconcave disc that has no nucleus