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There are 80 eighteen-letter words containing IUM

aluminium␣hydroxidealuminium␣silicatesammonium␣carbamatesbasichondrocraniumbibenzonium␣bromidebisperoxovanadiumsblue-green␣bacteriumbromide␣of␣potassiumcalcium␣diglutamatecirculating␣mediumscollege␣wage␣premiumcyclohexylammoniumdesulfitobacteriumdiazonium␣compoundsdifferential␣mediumdihydroxyaluminiumdynamic␣equilibriumgeneral␣equilibriuminterstellar␣mediumlabium␣inferius␣orislabium␣superius␣orislithium␣borohydridelithium␣naphthalenelithium␣naphthalidelithium␣oxybutyratelithium␣perchloratelosses␣of␣consortiumlow-enriched␣uraniummagnesium␣carbonatemagnesium␣caseinatemagnesium␣hydroxidemagnesium␣phosphatemedium␣spiny␣neuronsmediumwave␣infraredmethylimidazoliumsodium␣generis␣humanipartial␣equilibriumpeppermint␣geraniumpicocyanobacteriumpotassium␣ascorbatepotassium␣carbonatepotassium␣chromatespotassium␣feldsparspotassium␣gluconatepotassium␣guanylatepotassium␣hydroxidepotassium␣inosinateproscenium␣curtainsprospidium␣chloridepseudoparaphylliumquaternary␣ammoniumruthenium␣tetroxidesecular␣equilibriumsodium␣bicarbonatessodium␣borohydridessodium␣hypochloritesodiumthiosulphate sodium␣thiosulphatestatic␣equilibriumsstrawberry␣geraniumtentorium␣cerebellitetraalkylammoniumtetrabutylammoniumtetraethylammoniumtetrahexylammoniumtetramethyluroniumtipranavir␣disodiumtransmission␣mediumtrimethylaluminiumtrimethylammoniumstrimethylanaminiumtrimethylsulfoniumtriphenylaluminiumtriphenylmethyliumtriumphalisticallytubulointerstitiumvanadium␣chromagensvanadium␣pentoxidesvaticinium␣ex␣eventuyttrium␣iron␣garnets

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 35 words
  • Spanish Wiktionary: no word
  • Italian Wiktionary: no word
  • German Wiktionary: 46 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 61 words

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