Words that Rhyme with spontaneous
4 Syllable Words
extraneous
5 Syllable Words
miscellaneous, percutaneous, simultaneous
6 Syllable Words
contemporaneous
Definitions of spontaneous
a. Proceding from natural feeling, temperament, or disposition, or from a native internal proneness, readiness, or tendency, without constraint; as, a spontaneous gift or proportion.
a. Proceeding from, or acting by, internal impulse, energy, or natural law, without external force; as, spontaneous motion; spontaneous growth.
a. Produced without being planted, or without human labor; as, a spontaneous growth of wood.