represent vs form

represent is not a noun while form is a noun.

Word	Noun	Adjective	Verb	Adverb
represent	No	No	Yes	No
form	Yes	No	Yes	No

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

Other hyponyms of represent include make, compose, constitute, make, range, straddle, fall into, fall under, pose, present, supplement.

represent (noun)	form (noun)
	the spatial arrangement of something as distinct from its substance
	a life-size dummy used to display clothes
	a mold for setting concrete
	the visual appearance of something or someone
	any spatial attributes (especially as defined by outline)
	an ability to perform well
	a particular mode in which something is manifested
	alternative names for the body of a human being
	a perceptual structure
	a category of things distinguished by some common characteristic or quality
	the phonological or orthographic sound or appearance of a word that can be used to describe or identify something
	a printed document with spaces in which to write
	an arrangement of the elements in a composition or discourse
	a body of students who are taught together
	(biology) a group of organisms within a species that differ in trivial ways from similar groups
	(physical chemistry) a distinct state of matter in a system; matter that is identical in chemical composition and physical state and separated from other material by the phase boundary

represent (verb)	form (verb)
to establish a mapping (of mathematical elements or sets)	give shape or form to
serve as a means of expressing something	assume a form or shape
express indirectly by an image, form, or model; be a symbol	make something, usually for a specific function
point out or draw attention to in protest or remonstrance	create (as an entity)
bring forward and present to the mind	establish or impress firmly in the mind
describe or present, usually with respect to a particular quality	to compose or represent
create an image or likeness of	develop into a distinctive entity
play a role or part
perform (a play), especially on a stage
be a delegate or spokesperson for; represent somebody's interest or be a proxy or substitute for, as of politicians and office holders representing their constituents, or of a tenant representing other tenants in a housing dispute
be representative or typical for
be the defense counsel for someone in a trial
form or compose
be typical of
take the place of or be parallel or equivalent to