paradox a statement that contradicts itself
paddock a pen for horses
haddock lean white flesh of fish similar to but smaller than cod
paradigm a standard or typical example
radical far beyond the norm
shaddock southeastern Asian tree producing large fruits resembling grapefruits
dry dock a large dock from which water can be pumped out
piddock marine bivalve that bores into rock or clay or wood by means of saw-like shells
dry-dock maneuver (a ship) into a drydock
burdock any of several erect biennial herbs of temperate Eurasia having stout taproots and producing burs
restock stock again
drydock a large dock from which water can be pumped out
airdock a large structure at an airport where aircraft can be stored and maintained
Rostock a city in northeastern Germany near the Baltic sea
mattock a kind of pick that is used for digging
radio medium for communication
dock landing in a harbor next to a pier where ships are loaded and unloaded or repaired; may have gates to let water in or out
rowlock a holder attached to the gunwale of a boat that holds the oar in place and acts as a fulcrum for rowing
radicle a small structure resembling a rootlet
roadblock any condition that makes it difficult to make progress or to achieve an objective