13-Letter Words Starting With IS

There are 17 13-letter words that start with IS. 3 are common words, such as ISOLATIONISMS and ISOLATIONISTS. A rarer one is ISOTONICITIES. In this set, O is the most frequent open letter (17 words). 5 words contain a doubled letter.

Full list 17

isolationismsisolationistsisometricallyisoagglutininisodimorphismisoelectronicisoalloxazineisoantibodiesisocarboxazidisochromosomeisochronouslyisomerizationisoprenalinesisoproterenolisosmoticallyisostaticallyisotonicities

About this list

Words
17 (3 common words)
Common example
isolationisms
Rare example
isotonicities
Doubled letters
5
Ending in S
5
Most frequent letter
O (17)

Questions

How many 13-letter words starting with is are there?

17. 3 of them are common words.

What is a common example?

ISOLATIONISMS is among the common words in this set.