12-Letter Words Matching _____R_O____

There are 52 12-letter words that match _____R_O____. 26 are common words, such as BACTERIOLOGY and BOMBPROOFING. A rarer one is TIMBERDOODLE. In this set, E is the most frequent open letter (40 words). 16 words contain a doubled letter.

Full list 52

Common words

bacteriologybombproofingcensoriouslycenterboardsdisharmoniesfingerboardsfireproofinggregariouslyheatproofingingloriouslylugubriouslymortarboards
bacteriologybombproofingcensoriouslycenterboardsdisharmoniesfingerboardsfireproofinggregariouslyheatproofingingloriouslylugubriouslymortarboardsmotherboardsmysteriouslynetherworldsnoncorrodingnoncorrosivenonnarcoticsoutperformedparatroopersporterhousesprecariouslyrustproofingsummerhousesuproariouslyvictoriouslybacteriostatchondriosomecostermongercumbersomelydaguerrotypehemorrhoidalmothproofingorthorhombicperjuriouslyposterioritysalubriouslysilverpointsteeterboardsbacteriocinsbeaverboardscalcareouslydisharmonizeletterboxingmotherhousesmothproofersnoncorporatenonperformernonpurposivesemiarborealtenebrionidstimberdoodle

About this list

Words
52 (26 common words)
Common example
bacteriology
Rare example
timberdoodle
Doubled letters
16
Ending in S
17
Most frequent letter
E (40)

Questions

How many 12-letter words matching _____r_o____ are there?

52. 26 of them are common words.

What is a common example?

BACTERIOLOGY is among the common words in this set.