spontaneous vs unprompted

spontaneous and unprompted both are adjectives.

Word	Noun	Adjective	Verb	Adverb
spontaneous	No	Yes	No	No
unprompted	No	Yes	No	No

spontaneous (adjective)	unprompted (adjective)
happening or arising without apparent external cause	proceeding from natural feeling or impulse without external stimulus
said or done without having been planned or written in advance