12-Letter Words Matching ________A_D_

There are 20 12-letter words that match ________A_D_. 10 are common words, such as CENTERBOARDS and CHAMBERMAIDS. A rarer one is THITHERWARDS. In this set, S is the most frequent open letter (20 words). 4 words contain a doubled letter.

Full list 20

centerboardschambermaidscountermandsfingerboardsmortarboardsmotherboardsnoticeboardspasturelandsspringboardsswitchboardscheeseboardsscratchcardssplashboardsteeterboardsbeaverboardscounterraidsfantasylandsinterstrandspaddleboardsthitherwards

About this list

Words
20 (10 common words)
Common example
centerboards
Rare example
thitherwards
Doubled letters
4
Ending in S
20
Most frequent letter
S (20)

Questions

How many 12-letter words matching ________a_d_ are there?

20. 10 of them are common words.

What is a common example?

CENTERBOARDS is among the common words in this set.