fleck vs plaque

fleck and plaque both are nouns.

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

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

fleck (noun)	plaque (noun)
a small contrasting part of something	a memorial made of brass
a small fragment of something broken off from the whole	(pathology) a small abnormal patch on or inside the body

fleck (verb)	plaque (verb)
make a spot or mark onto