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