bach, ballcock, bangkok, bloc, bloch, block, blok, bock, caulk, chalk, chock, clock, cock, crock, doc, dock, floc, flock, frock, hock.
Your query has returned 303 words, which include anagrams of antiknocks as well as other shorter words that can be made using the letters included in antiknocks.
The words in this list can be used in games such as Scrabble, Words with Friends, Wordscapes and other similar games.