Here's what rhymes with pentaethylene.
lean lien saline seen mean green scene clean screen gene keen bean bien dean eine gasoline spleen ethylene heen teen amine aniline cn hyaline mien sheen agin beene bein feen glean hsien keine mein peine wean xylene chine sardine scalene ween baleen gasolene jean preen peen colleen ursine subteen machine eighteen fourteen marine queen routine thirteen foreseen serene unseen vaccine caffeine evergreen obscene ravine unclean adenine alanine olivine tween latrine naphthalene rapine overseen careen sateen gamine touchscreen vitrine fifteen magazine intervene submarine polyethylene unforeseen acetylene ancien canteen casein cesarean convene cosine gelatine methylene codeine figurine hetween internecine propylene purine riverine theophylline aquiline demean mezzanine onscreen sunscreen supervene tambourine tourmaline windscreen mescaline neoprene peregrine tangerine trampoline tureen aubergine gabardine preteen sibylline beguine umpteen praline houseclean between sixteen nineteen seventeen adenosine benzene histamine kerosene nicotine amphetamine carotene cuisine guillotine histidine creatine cytosine libertine limousine oncogene thymidine philistine aquamarine caesarean cocain melamine mujahideen velveteen wintergreen wolverine woodbine astatine calcimine glutamine subroutine clonidine contravene ultramarine antisubmarine reconvene euclidean nectarine silkscreen antipodean grenadine incarnadine quarantine catecholamine phenylalanine cyclosporine polypropylene pyrimidine quinidine brigantine oxyacetylene brilliantine chlorpromazine Words that almost rhyme with pentaethylene
leam ream seem cm dream stream team theme beam cream supreme deem gleam scream seam diem feem bream creme teem haem agleam regime scheme steam esteem passim redeem upstream academe abeam extreme downstream systeme disesteem beseem inseam crossbeam selfesteem slipstream