13-Letter Words Containing ROI

There are 14 13-letter words that contain ROI. 2 are common words, such as HYPERTHYROIDS and MALADROITNESS. A rarer one is THYROIDITISES. In this set, E is the most frequent open letter (13 words). 2 words contain a doubled letter.

Full list 14

hyperthyroidsmaladroitnessaneroidographdisembroilingspheroidicityxanthochroismmicroinjectedorthopteroidsreembroideredsteroidogenicsuperheroinesthyroidectomythyroiditidesthyroiditises

About this list

Words
14 (2 common words)
Common example
hyperthyroids
Rare example
thyroiditises
Doubled letters
2
Ending in S
6
Most frequent letter
E (13)

Questions

How many 13-letter words containing roi are there?

14. 2 of them are common words.

What is a common example?

HYPERTHYROIDS is among the common words in this set.