knock down vs pull down

knock down and pull down both are verbs.

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

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

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

knock down (verb)	pull down (verb)
shatter as if by explosion	cause to come or go down
knock down with force	tear down so as to make flat with the ground
cause to come or go down