15-Letter Words Matching ____UM_________

There are 15 15-letter words that match ____UM_________. 6 are common words, such as CIRCUMFERENTIAL and CIRCUMLOCUTIONS. A rarer one is CIRCUMVALLATION. 2 words contain a doubled letter.

Full list 15

circumferentialcircumlocutionscircumnavigatedcircumnavigatescircumscriptioncircumspectionsbioluminescencecircumambulatedcircumambulatescircumstantiatecircumvallatingcircumvolutionscircumambientlycircumnavigatorcircumvallation

About this list

Words
15 (6 common words)
Common example
circumferential
Rare example
circumvallation
Doubled letters
2
Ending in S
5

Questions

How many 15-letter words matching ____um_________ are there?

15. 6 of them are common words.

What is a common example?

CIRCUMFERENTIAL is among the common words in this set.