Synonyms of the word

erratic

• adj. unsteady, random; prone to unexpected changes; not consistent.
• adj. Deviating from the common course in opinion or conduct; eccentric; odd.
• n. (geology) A rock moved from one location to another, usually by a glacier.
• n. Anything that has erratic characteristics.

changeable

• adj. Capable of being changed.
• adj. Subject to sudden or frequent changes.

changeful

• adj. (rare) Changing frequently; very susceptible to change; variable; fickle.

fickle

• adj. Quick to change one’s opinion or allegiance; insincere; not loyal or reliable.
• adj. (figuratively) changeable.
• v. (transitive) To deceive, flatter.
• v. (transitive, Britain dialectal) To puzzle, perplex, nonplus.

mercurial

• n. (obsolete) Any of the plants known as mercury.
• n. (astrology) Someone born under the influence of Mercury.
• n. (now historical) A preparation of mercury, especially as a treatment for syphilis.
• adj. (often capitalized, see Mercurial) Pertaining to the planet Mercury.
• adj. (often capitalized, see Mercurial) Pertaining to the Roman god Mercury, the god of trade; hence, money-making;…
• adj. (astrology) Born under the influence of the planet Mercury, and having such characteristics.
• adj. Of, or pertaining to the element mercury; containing mercury; caused by the action of mercury or quicksilver.
• adj. Having a volatile or lively character; quick-witted, changeable, animated.
• adj. Volatile, changeable.

planetary

• adj. (astronomy) Of, or relating to planets, or the orbital motion of planets.
• adj. Of, or relating to the Earth; terrestrial.
• adj. Of, or relating to the whole Earth; global.
• adj. (of a gear train) epicyclic.
• n. A planetary nebula.

quicksilver

• n. The metal mercury.
• n. (colloquial) An amalgam of mercury and tin applied to the backs of mirrors, quicksilvering.
• adj. Unpredictable, erratic or fickle; mercurial.
• v. To overlay with quicksilver.
• v. To treat with quicksilver.

temperamental

• adj. (not comparable) Of, related to, or caused by temperament.
• adj. Subject to changing and unpredictable emotional states; moody, capricious; sometimes used figuratively…

undependable

• adj. Not dependable.

unreliable

• adj. Not reliable.

unsettled

• adj. Disturbed, upset.
• adj. Not in a steady condition, uncertain, subject to change.
• adj. Not populated, having no settlers or other inhabitants.
• adj. Unpaid.
• v. simple past tense and past participle of unsettle.

wandering

• adj. Which wanders; travelling from place to place.
• adj. (medicine, of an organ) Abnormally capable of moving in certain directions.
• n. Travelling with no preset route; roaming.
• n. Irregular turning of the eyes.
• n. Aimless thought.
• n. Straying from a desired path.
• n. (chiefly in the plural) Disordered speech or delirium.
• v. present participle of wander.