reducing vs loss

reducing and loss both are nouns.

Word	Noun	Adjective	Verb	Adverb
reducing	Yes	No	No	No
loss	Yes	No	No	No

As nouns, loss is a hypernym of reducing; that is, loss is a word with a broader meaning than reducing:

reducing (noun)	loss (noun)
any process in which electrons are added to an atom or ion (as by removing oxygen or adding hydrogen); always occurs accompanied by oxidation of the reducing agent	the act of losing someone or something
loss of excess weight (as by dieting); becoming slimmer	the disadvantage that results from losing something
	military personnel lost by death or capture
	the experience of losing a loved one
	euphemistic expressions for death
	the amount by which the cost of a business exceeds its revenue
	something that is lost
	gradual decline in amount or activity