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.
bookshelf
The compound word that ends in "look" is "outlook."
One compound word ending with by is......... Driveby!
Endpoint.
bloodbank
buckeye
bookseller
snowflake
hotub
whiteboard
underage
basketballbaseballblackballbutterballdirtballeyeballfootballmeatballsnowballspitballfireballgoofballgumballhighballvolleyball
rowboat