13-Letter Words Matching ________R__S_

There are 15 13-letter words that match ________R__S_. 5 are common words, such as CHARACTERLESS and NONCONFORMIST. A rarer one is OVEREAGERNESS. In this set, I is the most frequent open letter (13 words). 4 words contain a doubled letter.

Full list 15

characterlessnonconformistpostmodernismpostmodernistschoolmarmishclavichordistnonconformismthaumaturgistxanthochroismantimodernistblackguardismcontainerlessflugelhornistoveradvertiseovereagerness

About this list

Words
15 (5 common words)
Common example
characterless
Rare example
overeagerness
Doubled letters
4
Ending in S
3
Most frequent letter
I (13)

Questions

How many 13-letter words matching ________r__s_ are there?

15. 5 of them are common words.

What is a common example?

CHARACTERLESS is among the common words in this set.