Is there such a word as proof?

Proof has several uses; it can be a noun, an adjective, and rarely, a shortened form of the verb proofread. Prove is a verb that either means to demonstrate one's competence or to verify something.

What is a light in one word?

light Add to list Share. ... Light is a source of illumination, whether a natural one (like the sun) or an artificial one (like your lamp). Like light itself, the word can take a lot of different forms — it can be a noun, an adjective, or a verb, and it can mean "bright" or "not heavy".