response vs counter

response and counter both are nouns.

Word	Noun	Adjective	Verb	Adverb
response	Yes	No	No	No
counter	Yes	Yes	Yes	Yes

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

response: the speech act of continuing a conversational exchange
counter: a quick reply to a question or remark (especially a witty or critical one)

Other hyponyms of response include counterblast, non sequitur, comeback, rejoinder, replication, retort, return, riposte, echo, answer.

response (noun)	counter (noun)
a bodily process occurring due to the effect of some antecedent stimulus or agent	a return punch (especially by a boxer)
the manner in which an electrical or mechanical device responds to an input signal or a range of input signals	table consisting of a horizontal surface over which business is transacted
the speech act of continuing a conversational exchange	a calculator that keeps a record of the number of times something happens
a statement (either spoken or written) that is made to reply to a question or request or criticism or accusation	a piece of leather forming the back of a shoe or boot
the manner in which something is greeted	game equipment (as a piece of wood, plastic, or ivory) used for keeping a count or reserving a space in various card or board games
a phrase recited or sung by the congregation following a versicle by the priest or minister	a piece of furniture that stands at the side of a dining room; has shelves and drawers
a result	(computer science) a register whose contents go through a regular series of states (usually states indicating consecutive integers)
	a quick reply to a question or remark (especially a witty or critical one)
	a person who counts things

response (adjective)	counter (adjective)
	indicating opposition or resistance

response (verb)	counter (verb)
	speak in response
	act in advance of; deal with ahead of time

response (adverb)	counter (adverb)
	in the opposite direction