immediately; at once; instantly
improvisation; improvised; impromptu; extempore
prompt decision; immediate decision; on-the-spot decision; summary judgment; summary judgement
prompt efficiency; immediate effectivity
immediately carrying out (a plan); right away; without delay; immediately
making a swift decision; making immediate decisions and taking quick actions
spot cash; cash payment; immediate payment (in cash); cash down
immediate effect; instant effect
prompt decision and prompt execution; make swift decisions and take quick actions
improvised; impromptu; extemporaneous; off-the-cuff; ad-lib
improvisation (usu. musical); impromptu performance
quick battle for a quick victory; blitzkrieg
buyout price (e.g. at an auction)
same-day sellout; selling out on the first day (of sale)
quick-acting remedy; fast-acting medicine