10-Letter Words Ending in UM

There are 100 10-letter words that end in UM. 33 are common words, such as ANTEBELLUM and AUDITORIUM. A rarer one is SUBOPTIMUM. In this set, I is the most frequent open letter (78 words). 13 words contain a doubled letter.

Full list 100

Common words

antebellumauditoriumcerebellumcolloquiumcompendiumconsortiumcurriculumdelphiniumdysprosiumepitheliumgadoliniumhonorarium
antebellumauditoriumcerebellumcolloquiumcompendiumconsortiumcurriculumdelphiniumdysprosiumepitheliumgadoliniumhonorariumkettledrumlawrenciummeerschaummemorandummillenniummolybdenummoratoriumnasturtiumopprobriumparameciumperitoneumpetrolatumpostpartumpromethiumprosceniumquadriviumreferendumsanatoriumsanitariumsubstratumtechnetiumacetabulumambulacrumandroeciumapotheciumargumentumascogoniumcinerariumcockalorumdiaconicumepicardiumepineuriumepisternumeupatoriumfumatoriumglochidiumhaustellumhaustoriumhorologiumhypanthiuminvolucrumlebensraumlycopodiummeitneriummiracidiummyocardiumnatatoriumnephridiumoceanariumommatidiumpancratiumpanjandrumparapodiumperiosteumplasmodiumprimordiumprincipiumprocambiumpropylaeumprostomiumpsalteriumpuerperiumseaborgiumsestertiumsimulacrumspermatiumsporangiumstramoniumsubminimumsubselliumsudatoriumtricliniumvibraculumcafetoriumepidendrumosmeteriumosmiridiumperimysiumphyllodiumpolemoniumpostbellumpraesidiumsanitoriumsclerotiumsequestrumstomodaeumstumblebumsuboptimum

About this list

Words
100 (33 common words)
Common example
antebellum
Rare example
suboptimum
Doubled letters
13
Ending in S
0
Most frequent letter
I (78)

Questions

How many 10-letter words ending in um are there?

100. 33 of them are common words.

What is a common example?

ANTEBELLUM is among the common words in this set.