particle vs speck

particle and speck both are nouns.

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

As nouns, particle and speck are synonyms defined as:

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

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

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