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