Here's what rhymes with triental.
mental gentle dental rental oriental lentil parental placental elemental judgmental judgemental detrimental ornamental regimental supplemental fundamental governmental accidental continental instrumental incidental incremental monumental sentimental temperamental occidental experimental developmental transcendental nonjudgmental compartmental excremental environmental coincidental unsentimental subcontinental intergovernmental nongovernmental transcontinental intercontinental Words that almost rhyme with triental
temple prudential semble torrential resemble assemble preferential tremble referential tangential deferential reverential credential dissemble reassemble influential presidential residential sequential providential evidential exemple penitential sentential inessential unessential exponential nonessential disassemble existential circumferential consequential inconsequential central metal settle pencil tensile ventral kettle rectal septal betel festal kennel mettle nettle petal venial fennel resettle fettle vestal level several essential potential careful vessel devil rebel methyl peril medal pedal projectile acetyl bevel eventful meddle mesial pebble resentful restful revel vengeful wrestle erectile faecal feral pestle pubertal revengeful sessile beryl nestle peddle prehensile utensil cecal mescal shekel bezel heckle zestful headstall chestful special differential helpful dreadful spectral sterile healthful orchestral dimethyl treble uneventful bestial fretful palpebral prayerful trestle dialectal speckle traversal unsettle bedevil bipedal freckle teakettle treadle pretzel dishevel epithelial ancestral especial respectful experiential stressful colorectal forgetful inferential imperil regretful primaeval embezzle gunmetal nonmetal shovelful successful celestial departmental endothelial neglectful tocopherol unhelpful distressful suspenseful unhealthful overcareful confidential disrespectful multilevel quintessential quadrupedal cockleshell unsuccessful nonresidential nondepartmental interdepartmental