13-Letter Words Matching I_______O____

There are 30 13-letter words that match I_______O____. 16 are common words, such as ICHTHYOLOGIES and ICHTHYOLOGIST. A rarer one is ISOCHRONOUSLY. In this set, N is the most frequent open letter (25 words). 6 words contain a doubled letter.

Full list 30

Common words

ichthyologiesichthyologistignominiouslyillustriouslyimpecuniouslyimpressionismimpressionistincongruouslyincredulouslyindustriouslyinjudiciouslyinquisitorial
ichthyologiesichthyologistignominiouslyillustriouslyimpecuniouslyimpressionismimpressionistincongruouslyincredulouslyindustriouslyinjudiciouslyinquisitorialinsectivorousintravenousesintravenouslyinvitationalsillocutionaryimpecuniosityinvolutionaryirreligiouslyinformatorilyinterboroughsintercolonialinterferograminterinvolvedinterinvolvesirreligionistisoantibodiesisochromosomeisochronously

About this list

Words
30 (16 common words)
Common example
ichthyologies
Rare example
isochronously
Doubled letters
6
Ending in S
7
Most frequent letter
N (25)

Questions

How many 13-letter words matching i_______o____ are there?

30. 16 of them are common words.

What is a common example?

ICHTHYOLOGIES is among the common words in this set.