topic vs topical

topic is a noun but topical is not a noun.

Word	Noun	Adjective	Verb	Adverb
topic	Yes	No	No	No
topical	No	Yes	No	No

topic (noun)	topical (noun)
some situation or event that is thought about
the subject matter of a conversation or discussion

topic (adjective)	topical (adjective)
	of or relating to or arranged by topics
	of interest at the present time
	pertaining to the surface of a body part