knock down (v.)
- auction
- auctioneer
- bang
- bash
- bat
- belittle
- belt
- biff
- bonk
- bulldog
- bulldoze
- clap
- clip
- clobber
- clout
- clump
- coldcock
- crack
- crush
- cut
- damp
- dampen
- darken
- dash
- deal
- debase
- deck
- decry
- degrade
- deject
- demoralize
- depreciate
- depress
- discourage
- discredit
- disgrace
- dishearten
- disparage
- dispirit
- down
- drop
- fell
- fetch
- flatten
- floor
- ground
- hit
- jab
- knock
- lay
- level
- lower
- minimize
- oppress
- overcome
- paste
- plunk
- poke
- precipitate
- prostrate
- punch
- rase
- raze
- sadden
- shake
- sink
- slam
- slight
- slog
- slug
- smack
- smash
- smite
- snap
- soak
- sock
- spread-eagle
- steamroller
- strike
- supinate
- swat
- swipe
- throw
- thump
- thwack
- topple
- trip
- tumble
- unbrace
- undo
- unman
- unnerve
- unstring
- upset
- wallop
- whack
- wham
- whop
- win