Nouns

(n)spot, speckle, dapple, patch, fleck, maculationa small contrasting part of something“a bald spot”, “a leopard's spots”, “a patch of clouds”, “patches of thin ice”, “a fleck of red”

Verbs

(v)stipple, speckleproduce a mottled effect“The sunlight stippled the trees”
(v)speckle, bespecklemark with small spots“speckle the wall with tiny yellow spots”