extend vs dot

extend is not a noun while dot is a noun.

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

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

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

extend (noun)	dot (noun)
	street name for lysergic acid diethylamide
	the shorter of the two telegraphic signals used in Morse code
	a very small circular shape

extend (verb)	dot (verb)
extend one's limbs or muscles, or the entire body	mark with a dot
thrust or extend out	make a dot or dots
extend in scope or range or area	distribute loosely
lengthen in time; cause to be or last longer	scatter or intersperse like dots or studs
continue or extend
expand the influence of
increase in quantity or bulk by adding a cheaper substance
prolong the time allowed for payment of
use to the utmost; exert vigorously or to full capacity
open or straighten out; unbend
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