Able to be demonstrated.

Something that can be demonstrated.

The quality of being demonstrable.

plural of demonstrable

A participant in a demonstration.

plural of demonstrative

plural of demonstrator

simple past tense and past participle of demonstrate

One who demonstrates anything, or proves beyond doubt. / The forefinger. / One who takes part in a demonstration; a protester. / One who demonstrates products in a retail environment; a merchandiser.

(transitive) to show how to use (something). / to show the steps taken to create a logical argument or equation. / (intransitive) to participate in or organize a demonstration.