topic vs content

topic and content both are nouns.

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

As nouns, content is a hypernym of topic; that is, content is a word with a broader meaning than topic:

topic: some situation or event that is thought about
content: the sum or range of what has been perceived, discovered, or learned

Other hypernyms of topic include cognitive content, mental object.

As nouns, content is a hypernym of topic; that is, content is a word with a broader meaning than topic:

Other hypernyms of topic include message, subject matter, substance.

topic (noun)	content (noun)
some situation or event that is thought about	something (a person or object or scene) selected by an artist or photographer for graphic representation
the subject matter of a conversation or discussion	the sum or range of what has been perceived, discovered, or learned
	content communicating a message; what something is about
	(usually plural) everything that is included in a collection and that is held or included in something
	the amount that can be contained
	the proportion of a substance that is contained in a mixture or alloy etc.
	the state of being contented with your situation in life

topic (adjective)	content (adjective)
	satisfied or showing satisfaction with things as they are

topic (verb)	content (verb)
	satisfy in a limited way
	make content