spontaneous

/spɑntˈeɪniəs/ · 4 syllables

Meaning

adjective

1. happening or arising without apparent external cause
   “spontaneous laughter”
2. said or done without having been planned or written in advance
   “he made a few ad-lib remarks”

Synonyms for spontaneous

• self-generated
• impulsive
• intuitive
• natural
• ad-lib
• unwritten
• unscripted

Antonyms of spontaneous

• induced

Words that rhyme with spontaneous

• extraneous
• contemporaneous
• miscellaneous
• percutaneous
• simultaneous
• subcutaneous