15-Letter Words Matching __R_N__________

There are 21 15-letter words that match __R_N__________. 4 are common words, such as CHRONOLOGICALLY and PARENTHETICALLY. A rarer one is STRONGYLOIDOSIS. In this set, O is the most frequent open letter (19 words). 8 words contain a doubled letter.

Full list 21

chronologicallyparentheticallystrenuousnessestyrannosaurusesagranulocytosesagranulocytosiserroneousnessesphrenologicallyserendipitouslyadrenalectomiesarrondissementschronobiologieschronobiologistchronotherapiescorynebacterialcorynebacteriumlaryngectomizedparanormalitiespersnicketinessstrongyloidosesstrongyloidosis

About this list

Words
21 (4 common words)
Common example
chronologically
Rare example
strongyloidosis
Doubled letters
8
Ending in S
13
Most frequent letter
O (19)

Questions

How many 15-letter words matching __r_n__________ are there?

21. 4 of them are common words.

What is a common example?

CHRONOLOGICALLY is among the common words in this set.