speedy, hasty, quick, prompt.

Speedy, quick; swift in motion or action; (also) sudden. Now archaic and rare, except as passing into A. 1b.

Acting, or disposed to act, without delay; prompt, ready. Usually constructed to with infinitive or noun.

Prompt, speedy.

Quick; frequent.

Quick, speedy, immediate. Obsolete.

Characterized by speed in operation or action; taking place rapidly or quickly.

Of an action or process, a means, remedy, etc.: Prompt, speedy, expeditious.

Of an action, event, process, etc.: that is done or happens with speed or with little or no delay; esp. that lasts or takes a short time; that is…

That posts; swift, speedy, rapid; hasty, hurrying, fleeting. Now poetic and rare.

That hastens; speeding. Now literary and poetic.

Of a person or animal: that moves or acts with great speed, hurry, or haste; (also) that charges or attacks.

Of actions: taking place quickly. Obsolete. rare.

Originally: †ready, at hand, immediate (obsolete). Now: of the nature of a magical transformation; rapid, quick, instantaneous.

= presto changeo, adj.

(of apparatus) that is able to act quickly.

Versatile, adaptable; resembling or of the nature of a conjuring trick. Hence: quick or sudden; swift and unexpected. Cf. quick change n. at quick…

The edge of a knife; also transferred, anything keenly cutting. Also attributive = knife-edged adj. at derivatives.

hyperbolically. Extremely fast.