pull down vs knock down

pull down and knock down both are verbs.

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

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

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

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