defend vs support

defend is not a noun while support is a noun.

Word	Noun	Adjective	Verb	Adverb
defend	No	No	Yes	No
support	Yes	No	Yes	No

As verbs, defend and support are synonyms defined as:

Other synonyms of defend include fend for.

As verbs, support is a hypernym of defend; that is, support is a word with a broader meaning than defend:

Other hypernyms of defend include back, endorse, indorse, plump for, plunk for.

defend (noun)	support (noun)
	aiding the cause or policy or interests of
	the act of bearing the weight of or strengthening
	documentary validation
	a military operation (often involving new supplies of men and materiel) to strengthen a military force or aid in the performance of its mission
	the activity of providing for or maintaining by supplying with money or necessities
	any device that bears the weight of another thing
	supporting structure that holds up or provides a foundation
	something providing immaterial assistance to a person or cause or interest
	a musical part (vocal or instrumental) that supports or provides background for other musical parts
	the financial means whereby one lives
	financial resources provided to make some project possible

defend (verb)	support (verb)
argue or speak in defense of	establish or strengthen as with new evidence or facts
state or assert	put up with something or somebody unpleasant
be on the defensive; act against an attack	adopt as a belief
protect against a challenge or attack	argue or speak in defense of
protect or fight for as a champion	be a regular customer or client of
fight against or resist strongly	be the physical support of; carry the weight of
be the defense counsel for someone in a trial	play a subordinate role to (another performer)
	support materially or financially
	give moral or psychological support, aid, or courage to
	be behind; approve of
	support with evidence or authority or make more certain or confirm