Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun rapid

1 sense of rapid

Sense 1
rapid -- (a part of a river where the current is very fast)
       => waterway -- (a navigable body of water)

Antonyms of adj rapid

2 senses of rapid

Sense 1
rapid -- (done or occurring in a brief period of time; "a rapid rise through the ranks")

INDIRECT (VIA fast) -> slow -- (not moving quickly; taking a comparatively long time; "a slow walker"; "the slow lane of traffic"; "her steps were slow"; "he was slow in reacting to the news"; "slow but steady growth")

Sense 2
rapid, speedy -- (characterized by speed; moving with or capable of moving with high speed; "a rapid movement"; "a speedy car"; "a speedy errand boy")

INDIRECT (VIA fast) -> slow -- (not moving quickly; taking a comparatively long time; "a slow walker"; "the slow lane of traffic"; "her steps were slow"; "he was slow in reacting to the news"; "slow but steady growth")

Similarity of adj rapid

2 senses of rapid

Sense 1
rapid -- (done or occurring in a brief period of time; "a rapid rise through the ranks")
       => fast (vs. slow) -- (acting or moving or capable of acting or moving quickly; "fast film"; "on the fast track in school"; "set a fast pace"; "a fast car")

Sense 2
rapid, speedy -- (characterized by speed; moving with or capable of moving with high speed; "a rapid movement"; "a speedy car"; "a speedy errand boy")
       => fast (vs. slow) -- (acting or moving or capable of acting or moving quickly; "fast film"; "on the fast track in school"; "set a fast pace"; "a fast car")