9-Letter Words Matching ____W_O__

There are 40 9-letter words that match ____W_O__. 16 are common words, such as ARROWROOT and BACKWOODS. A rarer one is WILDWOODS. In this set, O is the most frequent open letter (36 words). 36 words contain a doubled letter.

Full list 40

Common words

arrowrootbackwoodsbasswoodsbentwoodsdeadwoodselbowroomfirewoodshardwoodsironwoodspulpwoodsrosewoodsscrewworm
arrowrootbackwoodsbasswoodsbentwoodsdeadwoodselbowroomfirewoodshardwoodsironwoodspulpwoodsrosewoodsscrewwormsoftwoodstypewrotewidowhoodwormwoodsadvowsonsarrowwoodarrowwormbearwoodsbeefwoodscordwoodscorkwoodskingwoodsoverwrotepinewoodssourwoodsstrawwormteakwoodsagalwoodsbluewoodsfuelwoodshandwrotelacewoodslatewoodsmilkwoodsporkwoodssasswoodssquawrootwildwoods

About this list

Words
40 (16 common words)
Common example
arrowroot
Rare example
wildwoods
Doubled letters
36
Ending in S
29
Most frequent letter
O (36)

Questions

How many 9-letter words matching ____w_o__ are there?

40. 16 of them are common words.

What is a common example?

ARROWROOT is among the common words in this set.