13-Letter Words Matching __I__U_______

There are 13 13-letter words that match __I__U_______. 5 are common words, such as HEINOUSNESSES and OMINOUSNESSES. A rarer one is RUINOUSNESSES. In this set, N is the most frequent open letter (13 words). 9 words contain a doubled letter.

Full list 13

heinousnessesominousnessespainfulnessesreimbursementshipbuildingsquinquevalentquintuplicateunillustratedgainfulnessesphillumenistsquinquennialsquinquenniumsruinousnesses

About this list

Words
13 (5 common words)
Common example
heinousnesses
Rare example
ruinousnesses
Doubled letters
9
Ending in S
9
Most frequent letter
N (13)

Questions

How many 13-letter words matching __i__u_______ are there?

13. 5 of them are common words.

What is a common example?

HEINOUSNESSES is among the common words in this set.