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Adjective stimulant has 1 sense
stimulant, stimulating - that stimulates; "stimulant phenomena"Antonym:  depressant (indirect, via stimulative)
 
 
Noun stimulant has 2 senses
stimulation, stimulus, stimulant, input - any stimulating information or event; acts to arouse action--1 is a kind of information
 --1 has particulars:
stimulant, stimulant drug - a drug that temporarily quickens some vital process--2 is a kind of drug
 --2 has particulars:
 |  | amphetamine, pep pill, upper, speed; analeptic; aphrodisiac; butyl nitrite, isobutyl nitrite; kat, khat, qat, quat, cat, Arabian tea, African tea; methylphenidate, Ritalin; popper | 
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