15-Letter Words Matching _______R___U___

There are 14 15-letter words that match _______R___U___. 3 are common words, such as EXTRACURRICULAR and INFRASTRUCTURES. A rarer one is ULTRASTRUCTURES. In this set, T is the most frequent open letter (14 words). 2 words contain a doubled letter.

Full list 14

extracurricularinfrastructuressuperstructuresinfrastructuralsuperstructuralbremsstrahlungsmacrostructuralmacrostructuresmicroearthquakemicrostructuralmicrostructuressculpturesquelyultrastructuralultrastructures

About this list

Words
14 (3 common words)
Common example
extracurricular
Rare example
ultrastructures
Doubled letters
2
Ending in S
6
Most frequent letter
T (14)

Questions

How many 15-letter words matching _______r___u___ are there?

14. 3 of them are common words.

What is a common example?

EXTRACURRICULAR is among the common words in this set.