A fullback.
Chicken .
Duck
Brock (an old name for a badger).
try storks. it has the smae sound ending 5 letter bird with plural.
The letters DO followed by a CK spells "dock."The word do (doo) followed by the K sound is "duke."
No words in the English language begin with the letters ck.
A fullback.
Chicken .
buck
Duck
quick
alackattackbarrackbackpackbackblackbrickcockclockchickcheckchunkcarjackcowlickcassockcrockclickcluckcrosscheckcandlestickcrackcrickcrockdockduckdipstickdefrockflackfleckflickflockfrockfullbackgreenbackhumpbackhackhijackhalfbackhardtackhumpbackhatchbackhogbackhassockhaycockhayrickhaystackhockjackjockknapsackknackknockknickknacklacklicklipsticklockluckmatchstickmackmocknecknickpackpotluckpeckpeacockpollackpickpockpaycheckpadlockpuckpluckprickquickquackrackrickrackrecheckrepackrestockrockshamrockslapstickshackshockshucksicksocksuckslackslickslingbacksmocksmacksnacksnickspecksawbuckswaybackstrucktracktamaracktiebackthumbtacktricktruckunpackunlockunblockwhackwarlockwickwreckzwieback
Back Buck Black Block Brick
Bl@ck or blu3
No words start with "ck" but a lot of words end with this particular combination of letters, such as brick, hijack, frock, luck, and check.
Brock (an old name for a badger).