speed vs dash

speed and dash both are nouns.

Word	Noun	Adjective	Verb	Adverb
speed	Yes	No	Yes	No
dash	Yes	No	Yes	No

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

Other hyponyms of speed include barge, push forward, thrust ahead, buck, charge, shoot, shoot down, tear, dart, flash, scoot, scud, shoot.

speed (noun)	dash (noun)
changing location rapidly	a quick run
a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression	the act of moving with great haste
a rate (usually rapid) at which something happens	distinctive and stylish elegance
the ratio of the focal length to the diameter of a (camera) lens system	the longer of the two telegraphic signals used in Morse code
distance travelled per unit time	a punctuation mark (-) used between parts of a compound word or between the syllables of a word when the word is divided at the end of a line of text
	a footrace run at top speed

speed (verb)	dash (verb)
move faster	break into pieces, as by striking or knocking over
cause to move faster	add an enlivening or altering element to
move very fast	hurl or thrust violently
travel at an excessive or illegal velocity	cause to lose courage; to be daunted; to be scared away
move hurridly	run or move very quickly or hastily
	destroy or break