13-Letter Words Matching _________R_U_

There are 34 13-letter words that match _________R_U_. 3 are common words, such as CARBONIFEROUS and INSECTIVOROUS. A rarer one is ULTRAPOWERFUL. In this set, O is the most frequent open letter (33 words). 5 words contain a doubled letter.

Full list 34

Common words

carboniferousinsectivorousunadventurousaluminiferousanticlinoriumargentiferousargilliferousbalsamiferousbrachypterouscalcariferousfossiliferousglobuliferous
carboniferousinsectivorousunadventurousaluminiferousanticlinoriumargentiferousargilliferousbalsamiferousbrachypterouscalcariferousfossiliferousglobuliferousgraminivorousheteropterousheterosporoushymenopteroushypochondriumlepidopterousmetalliferousmycobacteriumnickeliferousovoviviparousperichondriumquartziferoussplendiferoussuccinctoriumtubuliflorousumbelliferousarmamentariumbibliolatrousgarnetiferousstoloniferoussuperpowerfulultrapowerful

About this list

Words
34 (3 common words)
Common example
carboniferous
Rare example
ultrapowerful
Doubled letters
5
Ending in S
26
Most frequent letter
O (33)

Questions

How many 13-letter words matching _________r_u_ are there?

34. 3 of them are common words.

What is a common example?

CARBONIFEROUS is among the common words in this set.