cut down vs subtract

cut down and subtract both are verbs.

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

As verbs, subtract is a hyponym of cut down; that is, subtract is a word with a more specific, narrower meaning than cut down:

cut down (verb)	subtract (verb)
cut down on; make a reduction in	take off or away
intercept (a player)	make a subtraction
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