drug-free vs sober

drug-free and sober both are adjectives.

Word	Noun	Adjective	Verb	Adverb
drug-free	No	Yes	No	No
sober	No	Yes	Yes	No

drug-free (adjective)	sober (adjective)
characteristic of a person not taking illegal drugs or of a place where no illegal drugs are used	not affected by a chemical substance (especially alcohol)
	completely lacking in playfulness
	lacking brightness or color; dull
	dignified and somber in manner or character and committed to keeping promises

drug-free (verb)	sober (verb)
	become sober after excessive alcohol consumption
	become more realistic
	cause to become sober