Antonyms of adv slowly

1 of 2 senses of slowly

Sense 1
slowly, slow, easy, tardily -- (without speed (`slow' is sometimes used informally for `slowly'); "he spoke slowly"; "go easy here--the road is slippery"; "glaciers move tardily"; "please go slow so I can see the sights")
       Antonym of quickly (Sense 1)
      => quickly, rapidly, speedily, chop-chop, apace -- (with rapid movements; "he works quickly")

Synonyms of adv slowly

2 senses of slowly

Sense 1
slowly, slow, easy, tardily -- (without speed (`slow' is sometimes used informally for `slowly'); "he spoke slowly"; "go easy here--the road is slippery"; "glaciers move tardily"; "please go slow so I can see the sights")

Sense 2
lento, slowly -- (in music; "Play this lento, please")