12-Letter Words Ending in UM

There are 28 12-letter words that end in UM. 2 are common words, such as PRASEODYMIUM and PROTACTINIUM. A rarer one is SPERMAGONIUM. In this set, I is the most frequent open letter (25 words). 5 words contain a doubled letter.

Full list 28

Common words

praseodymiumprotactiniumamphitheciumandrocliniumdiverticulumepithalamiumhibernaculumhypogastriuminfundibulumnielsbohriumperinephriumperionychium
praseodymiumprotactiniumamphitheciumandrocliniumdiverticulumepithalamiumhibernaculumhypogastriuminfundibulumnielsbohriumperinephriumperionychiumprothalamiumquinquenniumradiothoriumspermogoniumsuperpremiumsuperstratumtransuraniumunnilpentiumunnilquadiumxiphisternumappressoriumarchesporiumcladophyllumnonpetroleumpseudopodiumspermagonium

About this list

Words
28 (2 common words)
Common example
praseodymium
Rare example
spermagonium
Doubled letters
5
Ending in S
0
Most frequent letter
I (25)

Questions

How many 12-letter words ending in um are there?

28. 2 of them are common words.

What is a common example?

PRASEODYMIUM is among the common words in this set.