15-Letter Words Starting With IR

There are 13 15-letter words that start with IR. 1 are common words, such as IRRATIONALITIES and IRRELIGIOUSNESS. A rarer one is IRRITABLENESSES. In this set, L is the most frequent open letter (13 words). 13 words contain a doubled letter.

Full list 13

irrationalitiesirreligiousnessirreparablenessirresistibilityirreversibilityirrevocablenessirasciblenessesirrationalisticirreconcilablesirreformabilityirrefragabilityirrepealabilityirritablenesses

About this list

Words
13 (1 common words)
Common example
irrationalities
Rare example
irritablenesses
Doubled letters
13
Ending in S
7
Most frequent letter
L (13)

Questions

How many 15-letter words starting with ir are there?

13. 1 of them are common words.

What is a common example?

IRRATIONALITIES is among the common words in this set.