pinpoint vs speck

pinpoint and speck both are nouns.

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

As nouns, pinpoint and speck are synonyms defined as:

pinpoint (noun)	speck (noun)
the sharp point of a pin	a very small spot
a very small spot	a slight but appreciable amount
a very brief moment	(nontechnical usage) a tiny piece of anything

pinpoint (verb)	speck (verb)
locate exactly	produce specks in or on