11-Letter Words Matching _____R__Z__

There are 20 11-letter words that match _____R__Z__. 12 are common words, such as ANTIFREEZES and BASTARDIZED. A rarer one is UNAMORTIZED. In this set, I is the most frequent open letter (19 words). 7 words contain a doubled letter.

Full list 20

antifreezesbastardizedbastardizesconcertizedconcertizesfraternizedfraternizerfraternizesjeopardizedjeopardizeswesternizedwesternizesdeepfreezescoleorhizaemycorrhizaemycorrhizalmycorrhizasreenergizedreenergizesunamortized

About this list

Words
20 (12 common words)
Common example
antifreezes
Rare example
unamortized
Doubled letters
7
Ending in S
9
Most frequent letter
I (19)

Questions

How many 11-letter words matching _____r__z__ are there?

20. 12 of them are common words.

What is a common example?

ANTIFREEZES is among the common words in this set.