subject vs content

subject and content both are nouns.

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

As nouns, subject and content are synonyms defined as:

subject and content: something (a person or object or scene) selected by an artist or photographer for graphic representation

Other synonyms of subject include depicted object.

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

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

Other hypernyms of subject include cognitive content, mental object.

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

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

subject (noun)	content (noun)
something (a person or object or scene) selected by an artist or photographer for graphic representation	something (a person or object or scene) selected by an artist or photographer for graphic representation
a branch of knowledge	the sum or range of what has been perceived, discovered, or learned
some situation or event that is thought about	content communicating a message; what something is about
the subject matter of a conversation or discussion	(usually plural) everything that is included in a collection and that is held or included in something
(grammar) one of the two main constituents of a sentence; the grammatical constituent about which something is predicated	the amount that can be contained
(logic) the first term of a proposition	the proportion of a substance that is contained in a mixture or alloy etc.
a person who owes allegiance to that nation	the state of being contented with your situation in life
a person who is subjected to experimental or other observational procedures; someone who is an object of investigation

subject (adjective)	content (adjective)
likely to be affected by something	satisfied or showing satisfaction with things as they are
being under the power or sovereignty of another or others
possibly accepting or permitting

subject (verb)	content (verb)
make accountable for	satisfy in a limited way
cause to experience or suffer or make liable or vulnerable to	make content
make subservient; force to submit or subdue