rush vs scud

rush and scud both are nouns.

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

As verbs, scud is a hyponym of rush; that is, scud 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, dash, flash, scoot, shoot.

rush (noun)	scud (noun)
the act of moving hurriedly and in a careless manner	the act of moving along swiftly (as before a gale)
(American football) an attempt to advance the ball by running into the line
a sudden forceful flow
a sudden burst of activity
the swift release of a store of affective force
grasslike plants growing in wet places and having cylindrical often hollow stems

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

rush (verb)	scud (verb)
act at high speed	run or move very quickly or hastily
urge to an unnatural speed	run before a gale
attack suddenly
cause to occur rapidly
move hurridly
run with the ball, in football
cause to move fast or to rush or race