speck vs corpuscle

speck and corpuscle both are nouns.

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

As nouns, speck and corpuscle are synonyms defined as:

Other synonyms of speck include atom, molecule, mote, particle.

speck (noun)	corpuscle (noun)
a very small spot	either of two types of cells (erythrocytes and leukocytes) and sometimes including platelets
a slight but appreciable amount	(nontechnical usage) a tiny piece of anything
(nontechnical usage) a tiny piece of anything

speck (verb)	corpuscle (verb)
produce specks in or on