1. (adj)spontaneous, self-generated happening or arising without apparent external cause Synonyms: ad-lib, self-produced, self-generated, spontaneous, unwritten Antonyms: written, induced, scripted, evoked, iatrogenic, elicited
2. (adj)ad-lib, spontaneous, unwritten said or done without having been planned or written in advance Synonyms: unwritten, unrehearsed, ad-lib, oral, off-the-cuff, extemporaneous, extempore, self-generated, offhand, spontaneous, extemporary, impromptu, offhanded Antonyms: elicited, scripted, evoked, written, iatrogenic, induced
Synonyms, Thesaurus & Antonyms of 'spontaneous'
English Synonyms and Antonyms
1. spontaneous That is spontaneous which is freely done, with no external compulsion and, in human actions, without special premeditation or distinct determination of the will; that is voluntary which is freely Synonyms: spontaneous, automatic, impulsive, involuntary, voluntary, free, instinctive, unbidden, willing
Synonyms for spontaneous 
