13-Letter Words Matching ____I______U_

There are 16 13-letter words that match ____I______U_. 3 are common words, such as CARTILAGINOUS and MULTITUDINOUS. A rarer one is SUBBITUMINOUS. 4 words contain a doubled letter.

Full list 16

cartilaginousmultitudinousplatitudinousaluminiferouscarcinomatousfossiliferousgentianaceousgraminivorousovoviviparoussuccinctoriumtintinnabulumbibliolatrousoveringeniousplenitudinousrectitudinoussubbituminous

About this list

Words
16 (3 common words)
Common example
cartilaginous
Rare example
subbituminous
Doubled letters
4
Ending in S
14

Questions

How many 13-letter words matching ____i______u_ are there?

16. 3 of them are common words.

What is a common example?

CARTILAGINOUS is among the common words in this set.