palliation vs decrease

palliation and decrease both are nouns.

Word	Noun	Adjective	Verb	Adverb
palliation	Yes	No	No	No
decrease	Yes	No	Yes	No

As nouns, decrease is a hypernym of palliation; that is, decrease is a word with a broader meaning than palliation:

palliation: to act in such a way as to cause an offense to seem less serious
decrease: the act of decreasing or reducing something

Other hypernyms of palliation include diminution, reduction, step-down.

palliation (noun)	decrease (noun)
easing the severity of a pain or a disease without removing the cause	the act of decreasing or reducing something
to act in such a way as to cause an offense to seem less serious	the amount by which something decreases
	a change downward
	a process of becoming smaller or shorter

palliation (verb)	decrease (verb)
	decrease in size, extent, or range
	make become smaller