Synonyms of the word

madcap

• adj. impulsive, hasty or reckless; capricious.
• n. An impulsive, hasty, capricious person.
• n. (obsolete) An insane person, a lunatic.

adventurer

• n. One who enjoys adventures.
• n. A person who seeks a fortune in new and/or dangerous enterprises.
• n. A soldier of fortune, a speculator.
• n. A person who tries to advance their social position by somewhat devious means.
• n. (video games) A player of adventure games or text adventures.

brainish

• adj. (obsolete) hot-headed; furious.

daredevil

• n. A person who engages in very risky behavior, especially one who is motivated by a craving for excitement…
• adj. Recklessly bold; adventurous.

harum-scarum

• adj. wild, careless, irresponsible.
• adv. wildly, carelessly, irresponsibly.

hothead

• n. (pejorative) One who angers easily or goes in search of arguments or fights.
• n. One who reacts quickly and without thinking carefully first.

hotheaded

• adj. Pertaining to or characteristic of a hothead or hotheadedness; (of a person) easily excited or angered.

impetuous

• adj. Making arbitrary decisions, especially in an impulsive and forceful manner.
• adj. Characterized by sudden violence or vehemence.

impulsive

• adj. Having the power of driving or impelling; giving an impulse; moving; impellent.
• adj. Actuated by impulse or by transient feelings; inclined to make rapid decisions without due consideration.
• adj. (mechanics) Acting momentarily, or by impulse; not continuous – said of forces.
• n. That which impels or gives an impulse; an impelling agent.
• n. One whose behaviour or personality is characterized by being impulsive.

incautious

• adj. careless, reckless, not exercising proper caution.

lunatic

• n. An insane person.
• adj. crazed, mad, insane, demented.

swashbuckler

• n. A swordsman or fencer who engages in showy or extravagant sword play.
• n. A daring adventurer.
• n. A kind of period adventure story with flashy action and lighthearted tone.

tearaway

• n. (informal, chiefly Britain, pejorative) An impetuous and reckless person who is difficult to control;…

venturer

• n. (archaic) One who ventures; a traveller or explorer.
• n. (business) One who undertakes a business venture.