Fleck
Part of speech: noun
Definition: A flake A lock, as of wool. A small spot or streak; a speckle.
Part of speech: verb
Definition: To mark with small spots
Blob
Part of speech: noun
Definition: A shapeless or amorphous mass; a vague shape or amount, especially of a liquid or semisolid substance; a clump, group or collection that lacks definite shape.In astronomy, a large cloud of gas. In particular, an extended Lyman-Alpha blob is a huge body of gas that may be the precursor to a galaxy.