corpuscle vs flyspeck

corpuscle and flyspeck both are nouns.

Word	Noun	Adjective	Verb	Adverb
corpuscle	Yes	No	No	No
flyspeck	Yes	Yes	No	No

As nouns, flyspeck is a hyponym of corpuscle; that is, flyspeck is a word with a more specific, narrower meaning than corpuscle:

Other hyponyms of corpuscle include grain, grinding, chylomicron, identification particle.

corpuscle (noun)	flyspeck (noun)
either of two types of cells (erythrocytes and leukocytes) and sometimes including platelets	a tiny dark speck made by the excrement of a fly
(nontechnical usage) a tiny piece of anything

corpuscle (adjective)	flyspeck (adjective)
	very small