sail vs scud

sail and scud both are nouns.

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

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

Other hyponyms of sail include run, luff, point, weather, beat, rack, outpoint, tack, wear round, wear ship, change course, gybe, jib, jibe.

sail (noun)	scud (noun)
an ocean trip taken for pleasure	the act of moving along swiftly (as before a gale)
a large piece of fabric (usually canvas fabric) by means of which wind is used to propel a sailing vessel
any structure that resembles a sail

sail (verb)	scud (verb)
travel on water propelled by wind	run or move very quickly or hastily
move with sweeping, effortless, gliding motions	run before a gale
travel on water propelled by wind or by other means
traverse or travel on (a body of water)