IMMEDIATE Synonyms: 139 Similar and Opposite Words - Merriam-Webster
https://www.merriam-webster.com/thesaurus/immediate
WebSynonyms for IMMEDIATE: instantaneous, instant, rapid, split-second, quick, swift, summary, straightaway; Antonyms of IMMEDIATE: slow, prolonged, sluggish, protracted, deferred, tardy, dilatory, delayed
DA: 61 PA: 29 MOZ Rank: 66