speck vs pinpoint

speck and pinpoint both are nouns.

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

As nouns, speck and pinpoint are synonyms defined as:

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

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