13-Letter Words Matching _________RO__

There are 36 13-letter words that match _________RO__. 5 are common words, such as CARBONIFEROUS and INSECTIVOROUS. A rarer one is THUNDERSTROKE. In this set, S is the most frequent open letter (35 words). 4 words contain a doubled letter.

Full list 36

Common words

carboniferousinsectivorousphilodendronsrhododendronsunadventurousaluminiferousargentiferousargilliferousbalsamiferousbrachypterouscalcariferouscounterstroke
carboniferousinsectivorousphilodendronsrhododendronsunadventurousaluminiferousargentiferousargilliferousbalsamiferousbrachypterouscalcariferouscounterstrokedodecahedronsfossiliferousglobuliferousgraminivorousheteropterousheterosporoushymenopterouslepidopterousmetalliferousnickeliferousovoviviparousquartziferousrhombohedronssplendiferoustubuliflorousumbelliferousantielectronsbibliolatrousgarnetiferoushymenopteronsnorethindronestigmasterolsstoloniferousthunderstroke

About this list

Words
36 (5 common words)
Common example
carboniferous
Rare example
thunderstroke
Doubled letters
4
Ending in S
33
Most frequent letter
S (35)

Questions

How many 13-letter words matching _________ro__ are there?

36. 5 of them are common words.

What is a common example?

CARBONIFEROUS is among the common words in this set.