13-Letter Words Matching _____O____O__

There are 58 13-letter words that match _____O____O__. 11 are common words, such as AMELIORATIONS and ECHOLOCATIONS. A rarer one is THERMOPHILOUS. In this set, S is the most frequent open letter (49 words). 7 words contain a doubled letter.

Full list 58

Common words

ameliorationsecholocationsequivocationsfluorocarbonsheterogeneousinvigorationsirresolutionsmisquotationsreallocationsredecorationssemiconsciousdextroglucose
ameliorationsecholocationsequivocationsfluorocarbonsheterogeneousinvigorationsirresolutionsmisquotationsreallocationsredecorationssemiconsciousdextroglucoseentomophagousentomophilousforeconsciousheteropterousheterosporoushymenopterousinhomogeneouslepidopterouslymphosarcomaphylloquinonepneumonectomypsychobiologyreimpositionsrhombohedronssomatosensorystercoraceousallopolyploidantibourgeoisautopolyploidautorotationsbibliolatrousbutyrophenonecamphoraceouschronobiologyconglobationscryptozoologyendopolyploidenterocoelousepizootiologyexteroceptorshematophagousheterocystousheterokaryonshomologationshymenopteronsinteroceptorslabanotationsmycetophagousoverconsciousplastoquinonepostbourgeoispostpositionspreprocessorspsychohistorystereopticonsthermophilous

About this list

Words
58 (11 common words)
Common example
ameliorations
Rare example
thermophilous
Doubled letters
7
Ending in S
43
Most frequent letter
S (49)

Questions

How many 13-letter words matching _____o____o__ are there?

58. 11 of them are common words.

What is a common example?

AMELIORATIONS is among the common words in this set.