Hastier is the comparative form of hasty, meaning more rushed or hurried than something else.
A hasty decision is made too quickly; a hastier one is made with even less deliberation: His response was hasty, but hers was hastier still.
1. rapid — quicker, More rapid in pace; faster (With more velocity); swifter (More rapid in motion); speedier (More rapid, quicker); brisker
2. impulsive — rasher, Bacon portion; bolder (More courageous)
3. careless — sloppier, More untidy or careless
4. impatient — antsier, More nervously impatient; edgier (More tense or provocative); itchier (Causing greater skin irritation)