Synonyms of the word

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.

arbitrary

• adj. (usually of a decision) Based on individual discretion or judgment; not based on any objective distinction,…
• adj. Determined by impulse rather than reason; heavy-handed.
• adj. (mathematics) Any, out of all that are possible.
• adj. Determined by independent arbiter.
• adj. (linguistics) Not representative or symbolic; not iconic.
• n. Anything arbitrary, such as an arithmetical value or a fee.

brainish

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

capricious

• adj. Impulsive and unpredictable; determined by chance, impulse, or whim.

driving

• v. present participle of drive.
• adj. That drives (a mechanism or process).
• adj. That drives forcefully; strong; forceful; violent.
• n. The action of the verb to drive in any sense.
• n. In particular, the action of operating a motor vehicle.

dynamic

• adj. Changing; active; in motion.
• adj. Powerful; energetic.
• adj. Able to change and adapt.
• adj. (music) Having to do with the volume of sound.
• adj. (computing) Happening at runtime instead of being predetermined at compile time.
• adj. Pertaining to dynamics, the branch of mechanics concerned with the effects of forces on the motion of…
• adj. (grammar) Of a verb: not stative, but fientive; indicating continued or progressive action on the part…
• n. A characteristic or manner of an interaction; a behavior.
• n. (music) The varying loudness or volume of a song or the markings that indicate the loudness.
• n. (music) A symbol in a musical score that indicates the desired level of volume.
• n. (grammar) A verb that indicates continued or progressive action on the part of the subject.

dynamical

• adj. dynamic.

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.

incautious

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

madcap

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

spontaneous

• adj. Self-generated; happening without any apparent external cause.
• adj. Done by one's own free choice, or without planning.
• adj. proceeding from natural feeling or native tendency without external or conscious constraint.
• adj. arising from a momentary impulse.
• adj. controlled and directed internally; self-active; spontaneous movement characteristic of living things.
• adj. produced without being planted or without human labor; indigenous.
• adj. Random.
• adj. Sudden, without warning.

tearaway

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

unpremeditated

• adj. Performed, but not planned or thought out in advance; extemporaneous, but not unintentional.

unprompted

• adj. Not prompted.

whimsical

• adj. Given to whimsy; capricious; odd; peculiar; playful; light-hearted or amusing.