Synonyms for Hothead:

n.

purist, perfectionist, shrew, critic, wet blanket, diva, stickler, GRINCH, scourge. hothead (noun)
fire-eater, harum-scarum, swashbuckler, daredevil, madcap, lunatic.
person (noun)
fire-eater.

Other synonyms:

stickler, perfectionist, wet blanket, diva, purist. GRINCH, shrew, critic. scourge. Other relevant words:
critic, stickler, purist, perfectionist.