prune vs rationalise

prune is a noun but rationalise is not a noun.

Word	Noun	Adjective	Verb	Adverb
prune	Yes	No	Yes	No
rationalise	No	No	Yes	No

As verbs, prune and rationalise are synonyms defined as:

Other synonyms of prune include cut, rationalize.

prune (noun)	rationalise (noun)
dried plum

prune (verb)	rationalise (verb)
weed out unwanted or unnecessary things	weed out unwanted or unnecessary things
cultivate, tend, and cut back the growth of	remove irrational quantities from
	think rationally; employ logic or reason
	defend, explain, clear away, or make excuses for by reasoning
	structure and run according to rational or scientific principles in order to achieve desired results