13-Letter Words Matching ___T_____O___

There are 40 13-letter words that match ___T_____O___. 8 are common words, such as BACTERIOLOGIC and INSTITUTIONAL. A rarer one is URETHROSCOPES. In this set, R is the most frequent open letter (30 words). 3 words contain a doubled letter.

Full list 40

Common words

bacteriologicinstitutionalinstructionalmasterstrokesmultinationalparticleboardtestosteronesweatherproofsleptospirosesleptospirosismastigophoranphotocathodes
bacteriologicinstitutionalinstructionalmasterstrokesmultinationalparticleboardtestosteronesweatherproofsleptospirosesleptospirosismastigophoranphotocathodesphotocomposerphytohormonesxanthochroismabstractionalcontractionalcorticotropincysticercoidscysticercosescysticercosisdeuterostomesfestivalgoersmultiemployermultiregionalphotobiologicphotocomposedphotocomposesphotogeologicphotoperiodicphytopathogenpicturephonespostembryonalpostembryonicposttensionedpostulationalprotohistoricseptentrionalsouthernwoodsurethroscopes

About this list

Words
40 (8 common words)
Common example
bacteriologic
Rare example
urethroscopes
Doubled letters
3
Ending in S
16
Most frequent letter
R (30)

Questions

How many 13-letter words matching ___t_____o___ are there?

40. 8 of them are common words.

What is a common example?

BACTERIOLOGIC is among the common words in this set.