9-Letter Words Matching ____DW___

There are 12 9-letter words that match ____DW___. 6 are common words, such as BOARDWALK and FIELDWORK. A rarer one is SEMIDWARF. 5 words contain a doubled letter.

Full list 12

boardwalkfieldworkroundwormspeedwaysspeedwellworldwideblindwormbloodwormwoundwortfloodwaysroundwoodsemidwarf

About this list

Words
12 (6 common words)
Common example
boardwalk
Rare example
semidwarf
Doubled letters
5
Ending in S
2

Questions

How many 9-letter words matching ____dw___ are there?

12. 6 of them are common words.

What is a common example?

BOARDWALK is among the common words in this set.