decease vs loss

decease and loss both are nouns.

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

As nouns, loss is a hyponym of decease; that is, loss is a word with a more specific, narrower meaning than decease:

decease (noun)	loss (noun)
the event of dying or departure from life	the act of losing someone or something
	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

decease (verb)	loss (verb)
pass from physical life and lose all bodily attributes and functions necessary to sustain life