flyspeck vs atom

flyspeck and atom both are nouns.

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

As nouns, atom is a hypernym of flyspeck; that is, atom is a word with a broader meaning than flyspeck:

Other hypernyms of flyspeck include corpuscle, molecule, mote, particle, speck.

flyspeck (noun)	atom (noun)
a tiny dark speck made by the excrement of a fly	(physics and chemistry) the smallest component of an element having the chemical properties of the element
	(nontechnical usage) a tiny piece of anything

flyspeck (adjective)	atom (adjective)
very small