9-Letter Words Ending in UM

There are 128 9-letter words that end in UM. 38 are common words, such as ALUMINIUM and AMERICIUM. A rarer one is VESTIGIUM. In this set, I is the most frequent open letter (91 words). 26 words contain a doubled letter.

Full list 128

Common words

aluminiumamericiumantiserumarboretumbacteriumberkeliumberylliumbubblegumcolostrumcontinuumconundrumdeuterium
aluminiumamericiumantiserumarboretumbacteriumberkeliumberylliumbubblegumcolostrumcontinuumconundrumdeuteriumeffluviumflagellumgermaniumgymnasiumharmoniumlanthanummagnesiummausoleumneodymiumneptuniumpalladiumpetroleumplutoniumpotassiumpracticumpresidiumrutheniumstrontiumsugarplumsymposiumtelluriumterrariumtrapeziumultimatumytterbiumzirconiumanthodiumanthuriumasphaltumathenaeumbotulinumcaldariumcapitulumcolchicumcollegiumcollyriumcolumbiumcontagiumcredendumctenidiumcubiculumdecenniumdentaliumdiazoniumdichasiumdoronicumelateriumendosteumepicediumequisetumeuphoniumfastigiumflabellumgelsemiumgynaeceumgynoeciumherbariumhospitiumindecorummanubriummarsupiummenstruumoperculumprytaneumpycnidiumpyrethrumresponsumreticulumrhinariumrhizobiumrostellumsacrariumsargassumsarmentumsensillumsensoriumseptariumspirillumstomodeumsubphylumsyncytiumtaraxacumtenaculumtrienniumtrifoliumtriforiumunguentumuropygiumvirginiumbronchiumcalcaneumcalvariumcastoreumclaustrumclitellumcoccidiumcolluviumcolosseumcriteriumcymbidiumepimysiumgynaeciumhydroniummazaediumopusculumparamylumpolliniumpolygonumpterygiumreptiliumscutellumsulfoniumsympodiumtegmentumurediniumvestigium

About this list

Words
128 (38 common words)
Common example
aluminium
Rare example
vestigium
Doubled letters
26
Ending in S
0
Most frequent letter
I (91)

Questions

How many 9-letter words ending in um are there?

128. 38 of them are common words.

What is a common example?

ALUMINIUM is among the common words in this set.