13-Letter Words Containing UM

There are 151 13-letter words that contain UM. 45 are common words, such as ACCUMULATIONS and ARGUMENTATION. A rarer one is UMBILICATIONS. In this set, I is the most frequent open letter (128 words). 38 words contain a doubled letter.

Full list 151

Common words

accumulationsargumentationargumentativebumptiousnesscalumniationschrysanthemumcircumcisionscircumferencecircumscribedcircumscribescircumspectlycircumstanced
accumulationsargumentationargumentativebumptiousnesscalumniationschrysanthemumcircumcisionscircumferencecircumscribedcircumscribescircumspectlycircumstancedcircumstancescircumventingcircumventionconsummationscrumblinessesdehumidifiersdehumidifyingdisencumbereddocumentariesdocumentationhumanitarianshumanizationshumiliatinglyhumorlessnessilluminationsinstrumentalsinstrumentingluminescencesmummificationnoncumulativenumerologistspneumaticallypraseodymiumsprotactiniumspumpernickelsrheumaticallyrutherfordiumscrumptiouslysumptuousnesssupernumerarytraumaticallyuncircumcisedunconsummatedactinouraniumaluminiferousaluminothermyanticlinoriumcircumambientcircumscribercircumvallatecircumventivecolumelliformcolumniationsconsumeristicconsumptivelycumulostratusdocumentariandocumentaristecumenicalismferrochromiumfractocumulusfrumentaceoushypochondriumilluminometerintegumentaryintumescenceskettledrummermonumentalismmonumentalitymonumentalizemycobacteriumnumerologicalnumismatologyperichondriumpneumatographpneumatometerpneumatophorepneumogastricpneumonectomypresumptivelyprotoactiniumrumbustiouslystratocumulussuccinctoriumsummarizationsupercolumnarthaumaturgisttintinnabulumumbelliferousunnilpentiumsunnilquadiumszoosporangiumadumbrativelyalphanumericsanticonsumersantihumanismsantirheumaticarmamentariumcallithumpiancircumcenterscircumcirclescircumfusionscircumstellarconsumershipsdecamethoniumdetumescencesdocumentalistdocumentarilydumbfoundereddumortieritesecumenicitiesencumbrancersenumerabilityepithalamiumshexamethoniumhumificationsinhumannessesliebfraumilchlumpishnessesmisassumptionnonincumbentsnonleguminousnonnumericalsnonpetroleumsodontoglossumoverconsumingoverdocumentsphillumenistspneumatolyticpneumonitidespneumonitisesposttraumaticquadrumviratequinquenniumsradiothoriumsreassumptionsslumpflationssubbituminoussummabilitiessummersaultedsuperhumanitysuperpremiumsthaumaturgiestranshumancestriumphalismstriumphaliststumorigenesestumorigenesisumbilications

About this list

Words
151 (45 common words)
Common example
accumulations
Rare example
umbilications
Doubled letters
38
Ending in S
68
Most frequent letter
I (128)

Questions

How many 13-letter words containing um are there?

151. 45 of them are common words.

What is a common example?

ACCUMULATIONS is among the common words in this set.