15-Letter Words Matching __________R_C__

There are 12 15-letter words that match __________R_C__. 1 are common words, such as TRIGONOMETRICAL and GALVANOMETRICAL. A rarer one is TRANSHISTORICAL. 0 words contain a doubled letter.

Full list 12

trigonometricalgalvanometricalisoperimetricalphotoelectricalpiezoelectricalamphitheatricalcephalothoracesethnohistoricalnonmetaphoricalsemicylindricalsociohistoricaltranshistorical

About this list

Words
12 (1 common words)
Common example
trigonometrical
Rare example
transhistorical
Doubled letters
0
Ending in S
1

Questions

How many 15-letter words matching __________r_c__ are there?

12. 1 of them are common words.

What is a common example?

TRIGONOMETRICAL is among the common words in this set.