haste B2

/heɪst/ Great speed in doing something, often with too little care. M S

hasten C2+

/ˈheɪsən/ to move or act quickly; to cause something to happen sooner M S

hastiness C2+

/ˈheɪstinəs/ the quality of acting with excessive speed or insufficient thought M S

hasteful C2+

/ˈheɪstfəl/ marked by haste; hurried or precipitate (archaic) M S

posthaste C2+

/ˌpoʊstˈheɪst/ with all possible speed; very quickly M S

unhasty C2+

/ʌnˈheɪsti/ not hurried; deliberate and measured M S