Synonyms of spontaneous in English:

spontaneous


See definition of spontaneous

adjective

1‘a spontaneous display of affection’

SYNONYMS

unforced, voluntary, unconstrained, unprompted, unbidden, unsolicited, unplanned, unpremeditated, unrehearsed, impulsive, impetuous, unstudied, impromptu, spur-of-the-moment, extempore, extemporaneous

unschooled, untaught, uninstructed

informal off-the-cuff

ANTONYMS

planned, forced, calculated

2‘a spontaneous reaction to danger’

SYNONYMS

reflex, automatic, knee-jerk, involuntary, unthinking, unconscious, instinctive, instinctual

informal gut

ANTONYMS

conscious

3‘she seems friendly and spontaneous’

SYNONYMS

natural, uninhibited, relaxed, unselfconscious, unaffected, easy, free and easy

impulsive, impetuous

open, genuine

ANTONYMS

inhibited