harm vs burn

harm and burn both are nouns.

Word	Noun	Adjective	Verb	Adverb
harm	Yes	No	Yes	No
burn	Yes	No	Yes	No

As nouns, burn is a hyponym of harm; that is, burn is a word with a more specific, narrower meaning than harm:

As nouns, burn is a hyponym of harm; that is, burn is a word with a more specific, narrower meaning than harm:

harm: any physical damage to the body caused by violence or accident or fracture etc.; the condition of an injury
burn: an injury caused by exposure to heat or chemicals or radiation

harm (noun)	burn (noun)
the act of damaging something or someone	damage inflicted by fire
the occurrence of a change for the worse	a place or area that has been burned (especially on a person's body)
any physical damage to the body caused by violence or accident or fracture etc.; the condition of an injury	pain that feels hot as if it were on fire
	an injury caused by exposure to heat or chemicals or radiation

harm (verb)	burn (verb)
cause or do harm to	get a sunburn by overexposure to the sun
	undergo combustion
	cause to undergo combustion
	destroy by fire
	damage by burning with heat, fire, or radiation
	burn, sear, or freeze (tissue) using a hot iron or electric current or a caustic agent
	use up (energy)
	create by duplicating data
	feel strong emotion, especially anger or passion
	cause a sharp or stinging pain or discomfort
	feel hot or painful
	spend (significant amounts of money)
	execute by tying to a stake and setting alight
	shine intensely, as if with heat
	cause to burn or combust