rush vs dash

rush and dash both are nouns.

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

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

Other hyponyms of rush include bolt, scamper, scramble, scurry.

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

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

rush (noun)	dash (noun)
the act of moving hurriedly and in a careless manner	a quick run
(American football) an attempt to advance the ball by running into the line	the act of moving with great haste
a sudden forceful flow	distinctive and stylish elegance
a sudden burst of activity	the longer of the two telegraphic signals used in Morse code
the swift release of a store of affective force	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
grasslike plants growing in wet places and having cylindrical often hollow stems	a footrace run at top speed

rush (adjective)	dash (adjective)
done under pressure
not accepting reservations

rush (verb)	dash (verb)
act at high speed	break into pieces, as by striking or knocking over
urge to an unnatural speed	add an enlivening or altering element to
attack suddenly	hurl or thrust violently
cause to occur rapidly	cause to lose courage; to be daunted; to be scared away
move hurridly	run or move very quickly or hastily
run with the ball, in football	destroy or break
cause to move fast or to rush or race