12-Letter Words Matching ________R_I_

There are 20 12-letter words that match ________R_I_. 2 are common words, such as HYPERTHYROID and SCATTERBRAIN. A rarer one is SEROTONERGIC. In this set, E is the most frequent open letter (18 words). 3 words contain a doubled letter.

Full list 20

hyperthyroidscatterbrainalexipharmicantiallergicfeatherbrainhemispheroidhyperthermiamegalocardiaphotothermicthaumaturgicxanthochroidbetweenbraindopaminergichomeothermichyperthermicnormothermianormothermicorthopteroidschwarmereisserotonergic

About this list

Words
20 (2 common words)
Common example
hyperthyroid
Rare example
serotonergic
Doubled letters
3
Ending in S
1
Most frequent letter
E (18)

Questions

How many 12-letter words matching ________r_i_ are there?

20. 2 of them are common words.

What is a common example?

HYPERTHYROID is among the common words in this set.