13-Letter Words Matching ________C_A__

There are 16 13-letter words that match ________C_A__. 4 are common words, such as OBSTETRICIANS and PEDIATRICIANS. A rarer one is THALASSOCRATS. In this set, S is the most frequent open letter (16 words). 3 words contain a doubled letter.

Full list 16

obstetricianspediatriciansstatisticianstheoreticiansdialecticiansgeometriciansgeriatriciansaestheticiansantidesiccantbiometriciansinterglacialsnonphysiciansonomasticianssuperspecialsthalassocracythalassocrats

About this list

Words
16 (4 common words)
Common example
obstetricians
Rare example
thalassocrats
Doubled letters
3
Ending in S
14
Most frequent letter
S (16)

Questions

How many 13-letter words matching ________c_a__ are there?

16. 4 of them are common words.

What is a common example?

OBSTETRICIANS is among the common words in this set.