4-Letter Words Matching R_E_

There are 12 4-letter words that match R_E_. 9 are common words, such as REED and REEF. A rarer one is RUER. In this set, E is the most frequent open letter (5 words). 5 words contain a doubled letter.

Full list 12

reedreefreekreelrhearoesruedruesryesrielreesruer

About this list

Words
12 (9 common words)
Common example
reed
Rare example
ruer
Doubled letters
5
Ending in S
4
Most frequent letter
E (5)

Questions

How many 4-letter words matching r_e_ are there?

12. 9 of them are common words.

What is a common example?

REED is among the common words in this set.