speck vs particle

speck and particle both are nouns.

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

As nouns, speck and particle are synonyms defined as:

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

speck (noun)	particle (noun)
a very small spot	a function word that can be used in English to form phrasal verbs
a slight but appreciable amount	a body having finite mass and internal structure but negligible dimensions
(nontechnical usage) a tiny piece of anything	(nontechnical usage) a tiny piece of anything

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