atom vs corpuscle

atom and corpuscle both are nouns.

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

As nouns, atom and corpuscle are synonyms defined as:

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

atom (noun)	corpuscle (noun)
(physics and chemistry) the smallest component of an element having the chemical properties of the element	either of two types of cells (erythrocytes and leukocytes) and sometimes including platelets
(nontechnical usage) a tiny piece of anything	(nontechnical usage) a tiny piece of anything