Shelf is already a verb if used in the context of "to shelf something" or "to put something aside".
Shelf as in the unit on a wall is a noun.
The compound word that ends in "look" is "outlook."
One example of a compound word that ends in "cry" is "butterfly."
One compound word ending with by is......... Driveby!
underage
basketballbaseballblackballbutterballdirtballeyeballfootballmeatballsnowballspitballfireballgoofballgumballhighballvolleyball
buckeye
whiteboard
bookseller
bloodbank
Endpoint.
hotub
rowboat