extend vs spread

extend is not a noun while spread is a noun.

Word	Noun	Adjective	Verb	Adverb
extend	No	No	Yes	No
spread	Yes	Yes	Yes	No

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

Other hyponyms of extend include cross, span, sweep, traverse, sweep, overlap, overspread, ridge, constellate, dot, stud.

extend (noun)	spread (noun)
	act of extending over a wider scope or expanse of space or time
	decorative cover for a bed
	farm consisting of a large tract of land along with facilities needed to raise livestock (especially cattle)
	a haphazard distribution in all directions
	the expansion of a person's girth (especially at middle age)
	a conspicuous disparity or difference as between two figures
	two facing pages of a book or other publication
	process or result of distributing or extending over a wide expanse of space
	a tasty mixture to be spread on bread or crackers or used in preparing other dishes
	a meal that is well prepared and greatly enjoyed

extend (adjective)	spread (adjective)
	distributed or spread over a considerable extent
	fully extended in width
	prepared or arranged for a meal; especially having food set out

extend (verb)	spread (verb)
extend one's limbs or muscles, or the entire body	cause to become widely known
thrust or extend out	become widely known and passed on
extend in scope or range or area	distribute or disperse widely
lengthen in time; cause to be or last longer	spread out or open from a closed or folded state
continue or extend	become distributed or widespread
expand the influence of	cover by spreading something over
increase in quantity or bulk by adding a cheaper substance	distribute over a surface in a layer
prolong the time allowed for payment of	strew or distribute over an area
use to the utmost; exert vigorously or to full capacity	move outward
open or straighten out; unbend	spread across or over
extend or stretch out to a greater or the full length
cause to move at full gallop
offer verbally
make available; provide
span an interval of distance, space or time
reach outward in space
stretch out over a distance, space, time, or scope; run or extend between two points or beyond a certain point