13-Letter Words Matching O__E_________

There are 20 13-letter words that match O__E_________. 9 are common words, such as OBJECTIONABLE and OBJECTIONABLY. A rarer one is OSTEOSARCOMAS. In this set, I is the most frequent open letter (19 words). 6 words contain a doubled letter.

Full list 20

objectionableobjectionablyobjectivenessobjectivitiesobservationalobservatoriesobsessivenessoffensivenessorderlinessesobjectivisticobservabilityobsessionallyorientalizingorientationalostensibilityosteomalaciasosteomyelitisorienteeringsosteoplastiesosteosarcomas

About this list

Words
20 (9 common words)
Common example
objectionable
Rare example
osteosarcomas
Doubled letters
6
Ending in S
11
Most frequent letter
I (19)

Questions

How many 13-letter words matching o__e_________ are there?

20. 9 of them are common words.

What is a common example?

OBJECTIONABLE is among the common words in this set.