rapidly

adv.

[1]

quickly , quickly , speedily , fast , swiftly , chop-chop , apace , speedily , briskly , expeditiously , like a shot , at the speed of light , double-quick , at full speed , like one possessed , at a gallop , tantivy , (Colloq) like blazes , like (greased) lightning , (US) lickety-split , (Slang) like a bat out of hell , like mad

[2]

promptly , instantly , instantaneously , instanter , without delay , at once , straight away , right away , in a moment , in a trice , like a shot , in a wink , in (less than) no time , double-quick , in a flash , at the speed of light , before you (can) turn around , (Colloq) in a jiffy , in two shakes (of a lamb's tail) , like (greased) lightning , before you can say 'Jack Robinson' , (US/Canadian) (right) off the bat , lickety-split , (Slang) like a bat out of hell