15-Letter Words Matching _R____T________

There are 18 15-letter words that match _R____T________. 5 are common words, such as PREDESTINATIONS and PREHISTORICALLY. A rarer one is TRISOCTAHEDRONS. In this set, A is the most frequent open letter (17 words). 5 words contain a doubled letter.

Full list 18

predestinationsprehistoricallypretentiousnessproportionalityproportionatelypresbyterianismpresentationismprostatectomiesbremsstrahlungsgrammaticalnessgraphitizationsorchestrationalpredestinarianspresentablenessprioritizationsproportionatingtraumatizationstrisoctahedrons

About this list

Words
18 (5 common words)
Common example
predestinations
Rare example
trisoctahedrons
Doubled letters
5
Ending in S
11
Most frequent letter
A (17)

Questions

How many 15-letter words matching _r____t________ are there?

18. 5 of them are common words.

What is a common example?

PREDESTINATIONS is among the common words in this set.