Open English Wordnet
Adjectives
(s)rapid, speedycharacterized by speed; moving with or capable of moving with high speed“a rapid movement”,
“a speedy car”,
“a speedy errand boy” (s)quick, speedyaccomplished rapidly and without delay“was quick to make friends”,
“his quick reaction prevented an accident”,
“hoped for a speedy resolution of the problem”,
“a speedy recovery”,
“he has a right to a speedy trial”