13-Letter Words Matching _____TR______

There are 90 13-letter words that match _____TR______. 40 are common words, such as ACCOUTREMENTS and BACKSTRETCHES. A rarer one is UNDOCTRINAIRE. In this set, I is the most frequent open letter (80 words). 24 words contain a doubled letter.

Full list 90

Common words

accoutrementsbackstretchesbootstrappingdecentralizeddecentralizesdecontrollingdiametricallyeccentricallyequestrianismequestriennesfenestrationsgeometrically
accoutrementsbackstretchesbootstrappingdecentralizeddecentralizesdecontrollingdiametricallyeccentricallyequestrianismequestriennesfenestrationsgeometricallyglobetrottershomestretcheshypertrophiedhypertrophiesillustrationsillustriouslyindoctrinatedindoctrinatesindustrialismindustrialistindustrializeindustriouslyinfiltrationsisometricallymainstreamingmalnutritionsministrationsmousetrappingobstetricianspedestrianizepediatriciansperpetrationsredistributedredistributesredistrictingregistrationssymmetricallyundistributedredistributorcatastrophismcatastrophistclaustrophobegeometriciansgeriatriciansglobetrottingheliotropismsindoctrinatorlissotrichousoverstrainingoverstressingoverstretchedoverstretchespedestrianismphototropismssinistrocularslipstreamingstormtroopersuninstructiveanisotropismsbiometricianschemotropismschymotrypsinshydrotropismsindustrialiseintertropicallithotripsieslithotripterslithotriptorsluteotrophinsmagistraticalmagistraturesmethotrexatesmisattributedmisattributesmultitrackingmultitrillionnonnutritiousnonpetroleumsnonretractileobstetricallyoutintriguingpralltrillersprototrophiesrecentrifugedrecentrifugessympatricallythyrotrophinsundoctrinaire

About this list

Words
90 (40 common words)
Common example
accoutrements
Rare example
undoctrinaire
Doubled letters
24
Ending in S
43
Most frequent letter
I (80)

Questions

How many 13-letter words matching _____tr______ are there?

90. 40 of them are common words.

What is a common example?

ACCOUTREMENTS is among the common words in this set.