representation vs model

representation and model both are nouns.

Word	Noun	Adjective	Verb	Adverb
representation	Yes	No	No	No
model	Yes	Yes	Yes	No

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

representation: an activity that stands as an equivalent of something or results in an equivalent
model: the act of representing something (usually on a smaller scale)

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

representation: a creation that is a visual or tangible rendering of someone or something
model: representation of something (sometimes on a smaller scale)

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

representation (noun)	model (noun)
an activity that stands as an equivalent of something or results in an equivalent	the act of representing something (usually on a smaller scale)
the act of representing; standing in for someone or some group and speaking with authority in their behalf	representation of something (sometimes on a smaller scale)
a creation that is a visual or tangible rendering of someone or something	a hypothetical description of a complex entity or process
the right of being represented by delegates who have a voice in some legislative body	something to be imitated
a presentation to the mind in the form of an idea or image	a representative form or pattern
a factual statement made by one party in order to induce another party to enter into a contract	a type of product
a performance of a play	a person who poses for a photographer or painter or sculptor
a statement of facts and reasons made in appealing or protesting	someone worthy of imitation
a body of legislators that serve in behalf of some constituency	a woman who wears clothes to display fashions
the state of serving as an official and authorized delegate or agent

representation (adjective)	model (adjective)
	worthy of imitation

representation (verb)	model (verb)
	form in clay, wax, etc
	construct a model in the likeness of
	plan or create according to a model or models
	create a representation or simulation of
	display (clothes) as a mannequin
	assume a posture as for artistic purposes