14-Letter Words Matching ______X_______

There are 18 14-letter words that match ______X_______. 2 are common words, such as AMBIDEXTROUSLY and UNDEREXPOSURES. A rarer one is ULTRAEXCLUSIVE. In this set, I is the most frequent open letter (16 words). 4 words contain a doubled letter.

Full list 18

ambidextrouslyunderexposureshyperextensionsuperexpensivecanthaxanthinscytotaxonomiescytotoxicitiesdigitoxigeninshyperexcitablehyperexcretionhyperextendingmethylxanthineparadoxicalityphotooxidationphotooxidativephotooxidizingsuperexpressesultraexclusive

About this list

Words
18 (2 common words)
Common example
ambidextrously
Rare example
ultraexclusive
Doubled letters
4
Ending in S
6
Most frequent letter
I (16)

Questions

How many 14-letter words matching ______x_______ are there?

18. 2 of them are common words.

What is a common example?

AMBIDEXTROUSLY is among the common words in this set.