fleck vs pinpoint

fleck and pinpoint both are nouns.

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

As nouns, pinpoint is a hyponym of fleck; that is, pinpoint is a word with a more specific, narrower meaning than fleck:

fleck (noun)	pinpoint (noun)
a small contrasting part of something	the sharp point of a pin
a small fragment of something broken off from the whole	a very small spot
	a very brief moment

fleck (verb)	pinpoint (verb)
make a spot or mark onto	locate exactly