12-Letter Words Matching ___I______U_

There are 24 12-letter words that match ___I______U_. 4 are common words, such as AMBIDEXTROUS and DISINGENUOUS. A rarer one is SEMINIFEROUS. In this set, O is the most frequent open letter (21 words). 6 words contain a doubled letter.

Full list 24

ambidextrousdisingenuousmucilaginoussemipreciousargillaceouscapillaceouscarillonneurlaticiferousluminiferousperinephriumperionychiumradiothoriumresiniferoussapindaceoussemivitreousunnilpentiumunnilquadiumaltitudinousechinococcusheliolatrousperitrichousschizogonoussemilustrousseminiferous

About this list

Words
24 (4 common words)
Common example
ambidextrous
Rare example
seminiferous
Doubled letters
6
Ending in S
18
Most frequent letter
O (21)

Questions

How many 12-letter words matching ___i______u_ are there?

24. 4 of them are common words.

What is a common example?

AMBIDEXTROUS is among the common words in this set.