burn vs ache

burn and ache both are nouns.

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

As verbs, ache is a hypernym of burn; that is, ache is a word with a broader meaning than burn:

Other hypernyms of burn include hurt, smart.

As verbs, ache is a hypernym of burn; that is, ache is a word with a broader meaning than burn:

Other hypernyms of burn include hurt, smart.

burn (noun)	ache (noun)
damage inflicted by fire	a dull persistent (usually moderately intense) pain
a place or area that has been burned (especially on a person's body)
pain that feels hot as if it were on fire
an injury caused by exposure to heat or chemicals or radiation

burn (verb)	ache (verb)
get a sunburn by overexposure to the sun	have a desire for something or someone who is not present
undergo combustion	be the source of pain
cause to undergo combustion	feel physical pain
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