king-hit vs thump

king-hit

• A powerful punch; a knockout blow. 

thump

• The sound of such a blow; a thud. 

• A blow that produces a muffled sound. 

• To throb with a muffled rhythmic sound. 

• To hit (someone or something) as if to make a thump. 

• To cause to make a thumping sound. 

• To thud or pound.