rainbow
a 6 letter word ending with a w is borrow.
AllowArrowAskewBedewBelowBylaw.
Four letter words starting with B and ending with W are blew, blow, brow, and brew.
window
4 letter words W - M: * warm * worm * whim * wham
Jaw Saw Kaw
wearson
papaw, pilaw, pshaw
Words that end in W include throw, show, bow, and two. Other words ending in that letter are tomorrow and borrow.
Sparrow
plow
* threw * throw * shrew * arrow * screw * straw