Synonyms and related words :
accurate, active, alert, apt, attentive, careful, close, compliant, conforming, conscientious, conscionable, constant, correct, critical, decisive, delicate, demanding, detailed, devoted, devout, duteous, dutiful, exact, exacting, exigent, expeditious, exquisite, faithful, fastidious, fine, finical, finicking, finicky, fussy, heedful, immediate, instant, instantaneous, loyal, meticulous, mindful, minute, narrow, nice, observant, on the dot, on time, overconscientious, overscrupulous, painstaking, particular, practicing, precise, precisianistic, precisionistic, prompt, punctilious, quick, ready, refined, regardful, religious, rigid, rigorous, scrupulous, scrutinizing, speedy, strict, subtle, summary, swift, tender-conscienced, timely, TRUE