whip.
abash, asch, ash, ashe, bash, brash, cache, cash, clash, crash, dash, flash, gash, gnash, hash, lash, mash, nash, rash, rehash.
sheathers, thrashers.
Your query has returned 181 words, which include anagrams of thrashes as well as other shorter words that can be made using the letters included in thrashes.
The words in this list can be used in games such as Scrabble, Words with Friends, Wordscapes and other similar games.