ache vs sting

ache and sting both are nouns.

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

As verbs, sting is a hyponym of ache; that is, sting is a word with a more specific, narrower meaning than ache:

Other hyponyms of ache include bite, burn, burn, itch, hunger, thirst, act up, throb, shoot.

As verbs, sting is a hyponym of ache; that is, sting is a word with a more specific, narrower meaning than ache:

Other hyponyms of ache include catch, get, twinge, prick, twinge, kill.

ache (noun)	sting (noun)
a dull persistent (usually moderately intense) pain	a swindle in which you cheat at gambling or persuade a person to buy worthless property
	operation designed to catch a person committing a criminal act
	a kind of pain; something as sudden and painful as being stung
	a painful wound caused by the thrust of an insect's stinger into skin
	a mental pain or distress

ache (verb)	sting (verb)
have a desire for something or someone who is not present	saddle with something disagreeable or disadvantageous
be the source of pain	deliver a sting to
feel physical pain	cause an emotional pain, as if by stinging
	cause a stinging pain
	cause a sharp or stinging pain or discomfort