sympathise vs sympathy

sympathise is not a noun while sympathy is a noun.

Word	Noun	Adjective	Verb	Adverb
sympathise	No	No	Yes	No
sympathy	Yes	No	No	No

sympathise (noun)	sympathy (noun)
	an inclination to support or be loyal to or to agree with an opinion
	sharing the feelings of others (especially feelings of sorrow or anguish)
	a relation of affinity or harmony between people; whatever affects one correspondingly affects the other

sympathise (verb)	sympathy (verb)
be understanding of
to feel or express sympathy or compassion
share the feelings of; understand the sentiments of