Mammoth Uncensored Word List:
45 words ending with hs, 13 letters long

arithmographs blabbermouths breakthroughs breastploughs cathodographs centillionths chemoautrophs commonwealths counterweighs decilliardths drivethroughs elasmobranchs electrographs eleutherarchs ellipsographs enantiomorphs evaporographs flannelgraphs hairsbreadths handsbreadths harmonographs interboroughs keraunographs magnetographs marconigraphs meteorographs multidigraphs nonilliardths octilliardths opisthographs ornithomorphs oscillographs phraseographs pythonomorphs rephotographs scattergraphs septillionths sextillionths spectrographs sphygmographs steganographs subparagraphs thirdboroughs trochelminths weathercloths