13-Letter Words Matching _________N_U_

There are 18 13-letter words that match _________N_U_. 4 are common words, such as CARTILAGINOUS and MULTITUDINOUS. A rarer one is SUBBITUMINOUS. In this set, O is the most frequent open letter (18 words). 3 words contain a doubled letter.

Full list 18

cartilaginousmultitudinousplatitudinoustablespoonfulactinouraniumallochthonousarteriovenousautochthonousprolegomenousprotoactiniumdecamethoniumdiathermanoushexamethoniumnonindigenousnonleguminousplenitudinousrectitudinoussubbituminous

About this list

Words
18 (4 common words)
Common example
cartilaginous
Rare example
subbituminous
Doubled letters
3
Ending in S
13
Most frequent letter
O (18)

Questions

How many 13-letter words matching _________n_u_ are there?

18. 4 of them are common words.

What is a common example?

CARTILAGINOUS is among the common words in this set.