suggests an unvarying, machinelike reaction to a given stimulus or situation an automatic response
refers to that which is done without thought or volition, as a reflex action an involuntary scowl, an involuntary flicker of the eyelid
suggests an immediate, unwilled response to a stimulus, as if prompted by some natural, inborn tendency he took an instinctive liking to her
applies to that which is prompted by some external incitement or sudden inner inclination rather than by conscious rational volition an impulsive retort
applies to that which is done so naturally that it seems to come without prompting or premeditation a spontaneous demonstration
Find another word for spontaneous. In this page you can discover 73 synonyms, antonyms, idiomatic expressions, and related words for spontaneous, like: impromptu, involuntary, casual, natural, unconscious, instinctive, unplanned, ad-lib, unforced, volitional and unbidden.