Thermos rhymes with:
dermis, epidermis, amos, animous, animus, anonymous, artemus, autonomous, bemis, blasphemous, brademas, cadmus, christmas, christmas', clackamas, deltadromeus, demas, demus, dermis, domas, enormous, epidermis, erasmus, famous, grimace, hippopotamus, humus, ignoramus, imus, infamous, isthmus, lemus, litmus, los-palmas, lummus, magnanimous, mandamus, mcamis, mccomas, monogamous, nostradamus, paramus, paulhamus, polhemus, polygamous, posthumous, primus, promise, promus, pumice, pusillanimous, ramus, remus, seamus, shamas, shamus, st_thomas, synonymous, thalamus, thomas, trimas, ulmus, unanimous, varmus, venomous, warmus
Thermos sounds like:
tarango, tarmac, tarmacs, tarnish, tarnowski, tarrance, tarring, tearing, teetering, teheran's, teherani's, teheranis, teherans, tehran's, tehrani's, tehranis, tehrans, terence, terence's, term's, terming, terms, ternes, terns, terrains, terrance, terrence, terrones, thermco, thorn's, thornock, thorns, throng, throngs, throwing, tiramisu, tiring, torrance, torrence, torrens, torumi's, tottering, tourangeau, touring, tourneys, towering, train's, trainees, training, trains, tramco, trams, trance, tranche, tranches, trang, trans, transcisco, transco, transkei, transohio, transou, transue, transway, traumas, tremens, trench, trenches, trimac, trimas, trimming, trimmings, trims, trinka, triremes, trnka, troncoso, tronic, trounce, troung, troyanos, truancy, truman's, trumka, trunk, trunks, trunzo, truong, try-ons, trying, turing, turnage, turning, turnkey, turns, tutoring, tyrannies