Here's what rhymes with octavalent.
assailant divalent covalent inhalant Words that almost rhyme with octavalent
vacant halest patient payment latent nascent safest raiment vagrant palest sadist sanest vainest fainest statement adjacent latest basement pavement reagent claimant flagrant fragrant blatant faintest arraignment basest effacement shamefaced derailment cadenced defacement degassed tamest gamest staidest greatest arrangement attainment impatient placement amazement platelet abatement affidavit repayment bracelet bravest curtailment abasement ascertainment debasement plainest prepayment wavefront entailment nonpayment escapement lakefront straightest anapest chastest detainment plainchant edutainment ordainment subbasement opaqued insanest sedatest unsafest inanest urbanest displacement engagement containment supernatant complacent complainant derangement enslavement restatement complaisant misstatement disarrangement encasement obtainment quaintest underpayment nonadjacent humanest entertainment replacement rearrangement disengagement estrangement understatement emplacement entrainment intranet overstatement misplacement prearrangement infotainment unchastest reinstatement