cut down vs knock down

cut down and knock down both are verbs.

Word	Noun	Adjective	Verb	Adverb
cut down	No	No	Yes	No
knock down	No	No	Yes	No

As verbs, cut down and knock down are synonyms defined as:

Other synonyms of cut down include down, pull down, push down.

cut down (verb)	knock down (verb)
cut down on; make a reduction in	shatter as if by explosion
intercept (a player)	knock down with force
cause to come or go down	cause to come or go down
cut with a blade or mower
cause to fall by or as if by delivering a blow
cut with sweeping strokes; as with an ax or machete