fleck vs sundog

fleck and sundog both are nouns.

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

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

fleck: a small contrasting part of something
sundog: a bright spot on the parhelic circle; caused by diffraction by ice crystals

fleck (noun)	sundog (noun)
a small contrasting part of something	a bright spot on the parhelic circle; caused by diffraction by ice crystals
a small fragment of something broken off from the whole

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