1) Adrenocorticotrophic 2) Adrenocorticotropic 3) Analeptic 4) Excitant 5) Excitative 6) Excitatory 7) Getting a reaction 8) Irritating 9) Irritative 10) Serving to stimulate 11) Stimulant 12) Stimulating 
• (n.) That which stimulates. • (a.) Having the quality of stimulating.
Stim'u·la·tive adjective Having the quality of stimulating. -- noun That which stimulates. 
[adj] - capable of arousing or accelerating physiological or psychological activity or response by a chemical agent
adjective capable of arousing or accelerating physiological or psychological activity or response by a chemical agent
serving to stimulate.