red blood cell vs corpuscle

red blood cell and corpuscle both are nouns.

Word	Noun	Adjective	Verb	Adverb
red blood cell	Yes	No	No	No
corpuscle	Yes	No	No	No

As nouns, corpuscle is a hypernym of red blood cell; that is, corpuscle is a word with a broader meaning than red blood cell:

red blood cell: a mature blood cell that contains hemoglobin to carry oxygen to the bodily tissues; a biconcave disc that has no nucleus
corpuscle: either of two types of cells (erythrocytes and leukocytes) and sometimes including platelets

Other hypernyms of red blood cell include blood cell, blood corpuscle.

red blood cell (noun)	corpuscle (noun)
a mature blood cell that contains hemoglobin to carry oxygen to the bodily tissues; a biconcave disc that has no nucleus	either of two types of cells (erythrocytes and leukocytes) and sometimes including platelets
	(nontechnical usage) a tiny piece of anything