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1. Dictionary

   Spon·ta·ne·ous

   /spänˈtānēəs/

   

   adjective

   • 1. performed or occurring as a result of a sudden inner impulse or inclination and without premeditation or external stimulus: "the audience broke into spontaneous applause" Similar unforcedvoluntaryunconstrainedunpromptedunbiddenunsolicitedunplannedunpremeditatedunrehearsedimpulsiveimpetuousunstudiedimpromptuspur-of-the-momentextemporeextemporaneousunschooleduntaughtuninstructedinformal:off-the-cuffOpposite plannedforcedcalculated
   • ▪ (of a person) having an open, natural, and uninhibited manner. Similar naturaluninhibitedrelaxedunselfconsciousunaffectedeasyfree and easyimpulsiveimpetuousopengenuineOpposite inhibited
   • ▪ (of a process or event) occurring without apparent external cause: "spontaneous miscarriages"
   • ▪ (of movement or activity in an organism) instinctive or involuntary: "the spontaneous mechanical activity of circular smooth muscle" Similar reflexautomaticknee-jerkinvoluntaryunthinkingunconsciousinstinctiveinstinctualinformal:gutOpposite conscious
   • ▪ (of a plant) growing naturally and without being tended or cultivated.

   Word Origin mid 17th century: from late Latin spontaneus (from (sua) sponte ‘of (one's) own accord’) + -ous.

   Derivatives

   • 1. spontaneousness noun

   Scrabble Points: 13

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2. www.vocabulary.com › dictionary › spontaneousSpontaneous - Definition, Meaning & Synonyms | Vocabulary.com

   www.vocabulary.com › dictionary › spontaneous

   happening or arising without apparent external cause. “ spontaneous laughter”. “ spontaneous combustion”. synonyms: self-generated. impulsive, unprompted. proceeding from natural feeling or impulse without external stimulus. intuitive. spontaneously derived from or prompted by a natural tendency. instinctive, natural.

3. www.powerthesaurus.org › spontaneous › synonymsSpontaneous synonyms - 1 568 Words and Phrases for Spontaneous

   www.powerthesaurus.org › spontaneous › synonyms

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   Spontaneous synonyms - 1 568 Words and Phrases for Spontaneous. natural. adj. # instinctive. impulsive. adj. # easy , instinctive. automatic. adj. # casual. unpremeditated. adj. # impulsive , free. involuntary. adj. # instinctive. impromptu. adj. , adv. # impulsive. unplanned. adj. # impulsive , casual. extemporaneous. adj. # impulsive , rare.

4. www.powerthesaurus.org › spontaneousSPONTANEOUS in Thesaurus: 1000+ Synonyms & Antonyms for ...

   www.powerthesaurus.org › spontaneous

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   SPONTANEOUS in Thesaurus: 1000+ Synonyms & Antonyms for SPONTANEOUS. Synonyms. Similar meaning. View all. natural. impulsive. automatic. unpremeditated. involuntary. impromptu. unplanned. extemporaneous. instinctive. extempore. unstudied. unprompted. unrehearsed. voluntary. mechanical. unthinking. unconscious. reflex. spur-of-the-moment. casual.

5. www.wordreference.com › synonyms › spontaneousspontaneous - WordReference.com English Thesaurus

   www.wordreference.com › synonyms › spontaneous

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   spontaneous. WordReference English Thesaurus © 2022. Sense: Adjective: unplanned. Synonyms: unplanned, impromptu, unintentional, impulsive, offhand, off-the-cuff (informal), unrehearsed, unprovoked, instant , unpremeditated, ad-lib. Antonyms:

6. www.merriam-webster.com › dictionary › spontaneousSpontaneous Definition & Meaning - Merriam-Webster

   www.merriam-webster.com › dictionary › spontaneous

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   Synonyms of spontaneous. 1. : proceeding from natural feeling or native tendency without external constraint. 2. : arising from a momentary impulse. 3. : controlled and directed internally : self-acting. spontaneous movement characteristic of living things. 4. : produced without being planted or without human labor : indigenous. 5.

7. www.collinsdictionary.com › dictionary › english-thesaurusSPONTANEOUS Synonyms | Collins English Thesaurus

   www.collinsdictionary.com › dictionary › english-thesaurus

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   3 days ago · 1 (adjective) in the sense of unplanned. Definition. not planned or arranged. I joined in the spontaneous applause. Synonyms. unplanned. impromptu. unprompted. willing. free. natural. voluntary. instinctive. impulsive. unforced. unbidden. unconstrained. unpremeditated. extempore. uncompelled. See examples for synonyms. Opposites.

8. www.collinsdictionary.com › us › dictionarySynonyms of SPONTANEOUS | Collins American English Thesaurus

   www.collinsdictionary.com › us › dictionary

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   Apr 26, 2024 · 1 (adjective) in the sense of unplanned. Definition. not planned or arranged. I joined in the spontaneous applause. Synonyms. unplanned. impromptu. unprompted. willing. free. natural. voluntary. instinctive. impulsive. unforced. unbidden. unconstrained. unpremeditated. extempore. uncompelled. See examples for synonyms.