10-Letter Words Matching ____T_O___

There are 119 10-letter words that match ____T_O___. 50 are common words, such as ADDITIONAL and ADULTHOODS. A rarer one is XENOTROPIC. In this set, I is the most frequent open letter (75 words). 18 words contain a doubled letter.

Full list 119

Common words

additionaladulthoodsapostropheauditionedcoauthoredcountdownscourthousecourtroomsdevotionaldiphthongsdriftwoodselectrodes
additionaladulthoodsapostropheauditionedcoauthoredcountdownscourthousecourtroomsdevotionaldiphthongsdriftwoodselectrodeselectronicfirstbornsflintlocksfractionalfrictionalfunctionalfunctionedgreatcoatsheartwoodsirrationalkeystrokeslighthousemarathonermunitionedmutationalnightgownspaintboxesparatroopspetitionedpetitionerpilothousepositionalpositionedquestionedquestionerrelationalsainthoodssanctionedshorthornssunstrokestightropesunbuttonedunorthodoxvacationedvacationervocationalvolitionalwaistcoatsrotationalallotropesallotropicanastropheautotrophsbinationalbracteolesbuckthornselectrojetemmetropiaeolotropicepistropheguestbooksguesthouseguestroomsideationalidiotropicisentropicjointwormsjunctionallipotropiclipotropinlocationalmesothoraxmunitionernotationaloblationalornithopodornithosispositionersweatboxestractionalunfathomedvenationalwheatwormsambitionedautotrophyauxotrophsauxotrophyazeotropescitationaldimethoateelectroingenantiomerequationalfirethornsfractionedfrontcourtfrostworksfruitwoodsgyrationalheartwormshydathodeskeystrokedlightwoodslimitrophemetathoraxnegationalnutationaloctothorpsornithosespaintworkspanettonesrebuttonedsemitropicstuntwomanstuntwomenwristlocksxenotropic

About this list

Words
119 (50 common words)
Common example
additional
Rare example
xenotropic
Doubled letters
18
Ending in S
42
Most frequent letter
I (75)

Questions

How many 10-letter words matching ____t_o___ are there?

119. 50 of them are common words.

What is a common example?

ADDITIONAL is among the common words in this set.