Difference between Speck and Mote

Speck

Part of speech: noun

Definition: A tiny spot, especially of dirt etc.

Example sentence: Our posturings, our imagined self-importance, the delusion that we have some privileged position in the universe, are challenged by this point of pale light. Our planet is a lonely speck in the great enveloping cosmic dark.

Mote

Part of speech: verb

Definition: must

Part of speech: noun

Definition: A small particle; a speck.A tiny computer for remote sensing. Also known as smartdust.