sympathy vs sympathize

sympathy is a noun but sympathize is not a noun.

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

sympathy (noun)	sympathize (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

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