Common Words:
* Block
* Clock
* Rock
* Shock
* Stock
* Tock (as in "tick-tock")
Less Common Words:
* Bock (a type of beer)
* Crock (a type of pottery)
* Flock (a group of birds)
* Huck (to throw)
* Knock
* Lock
* Mock
* Plock (a type of fishing lure)
* Smock (a type of garment)
* Smock (a type of garment)
* Wrock (a type of mythological creature)
Note: While "ock" can be a suffix, it's also often part of a root word, like "block" or "rock."