stoned vs hopped-up

stoned and hopped-up both are adjectives.

Word	Noun	Adjective	Verb	Adverb
stoned	No	Yes	No	No
hopped-up	No	Yes	No	No

As adjectives, stoned and hopped-up are synonyms defined as:

stoned and hopped-up: under the influence of narcotics, especially cannabis

stoned (adjective)	hopped-up (adjective)
under the influence of narcotics, especially cannabis	under the influence of narcotics, especially cannabis
	(of an automobile) having the engine modified to give extra power