Here's what rhymes with spontaenous.
heinous plainness grayness greyness Words that almost rhyme with spontaenous
famous mandamus ignoramus basis painless tailless tameness patience spacious stainless contagious tenacious audacious herbaceous ostentatious sameness bailiffs baseless lateness patients advantageous gracious greatness courageous impatience cadence nameless outrageous valence abeyance blameless capacious faithless hiatus sebaceous shameless shapeless tasteless waitress faceless faintness ungracious flirtatious fracas mendacious straightness weightless intranets periphrasis acquaintance payments conveyance attainments platelets fallacious pavements strangeness vivacious voracious basements complainants complaisance graceless inpatients quaintness salacious complacence humaneness perspicacious arrangements statements surveillance efficacious fragrance reagents assailants disadvantageous placements vexatious vagrants loquacious engagements claimants entertainments homeostasis repayments emplacements misstatements displacements replacements rearrangements