13-Letter Words Matching O__________I_

There are 14 13-letter words that match O__________I_. 3 are common words, such as OCEANOGRAPHIC and ONOMATOPOETIC. A rarer one is OXYHEMOGLOBIN. In this set, O is the most frequent open letter (11 words). 2 words contain a doubled letter.

Full list 14

oceanographiconomatopoeticopportunisticobjectivisticoligopolisticombudsmanshiporganogenesisorthocephalicoscilloscopicosteomyelitisodontoblasticorganogeneticoverenergeticoxyhemoglobin

About this list

Words
14 (3 common words)
Common example
oceanographic
Rare example
oxyhemoglobin
Doubled letters
2
Ending in S
2
Most frequent letter
O (11)

Questions

How many 13-letter words matching o__________i_ are there?

14. 3 of them are common words.

What is a common example?

OCEANOGRAPHIC is among the common words in this set.