prioritise vs rate

prioritise is not a noun while rate is a noun.

Word	Noun	Adjective	Verb	Adverb
prioritise	No	No	Yes	No
rate	Yes	No	Yes	No

As verbs, rate is a hypernym of prioritise; that is, rate is a word with a broader meaning than prioritise:

Other hypernyms of prioritise include grade, order, place, range, rank.

prioritise (noun)	rate (noun)
	the relative speed of progress or change
	amount of a charge or payment relative to some basis
	a quantity or amount or measure considered as a proportion of another quantity or amount or measure
	a magnitude or frequency relative to a time unit

prioritise (verb)	rate (verb)
assign a priority to	assign a rank or rating to
	estimate the value of
	be worthy of or have a certain rating