subtract vs bring down

subtract and bring down both are verbs.

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

As verbs, bring down is a hypernym of subtract; that is, bring down is a word with a broader meaning than subtract:

Other hypernyms of subtract include cut, cut back, cut down, reduce, trim, trim back, trim down.

subtract (verb)	bring down (verb)
take off or away	cut down on; make a reduction in
make a subtraction	impose something unpleasant
	cause to be enthusiastic
	cause to come to the ground
	move something or somebody to a lower position
	cause the downfall of; of rulers