stipple vs speckle

stipple is not a noun while speckle is a noun.

Word	Noun	Adjective	Verb	Adverb
stipple	No	No	Yes	No
speckle	Yes	No	Yes	No

As verbs, stipple and speckle are synonyms defined as:

stipple (noun)	speckle (noun)
	a small contrasting part of something

stipple (verb)	speckle (verb)
produce a mottled effect	mark with small spots
engrave by means of dots and flicks	produce a mottled effect
make by small short touches that together produce an even or softly graded shadow, as in paint or ink
apply (paint) in small dots or strokes