25B6; adverb AS QUICKLY AS POSSIBLE, without delay, (very) quickly, speedily, without further/more ado, with all speed, promptly, immediately, at once, straight away, right away; informal pronto, straight off.
POST-HASTE
Meaning of POST-HASTE in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012