change course vs sail

change course is not a noun while sail is a noun.

Word	Noun	Adjective	Verb	Adverb
change course	No	No	Yes	No
sail	Yes	No	Yes	No

As verbs, sail is a hypernym of change course; that is, sail is a word with a broader meaning than change course:

change course (noun)	sail (noun)
	an ocean trip taken for pleasure
	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

change course (verb)	sail (verb)
shift from one side of the ship to the other	travel on water propelled by wind
	move with sweeping, effortless, gliding motions
	travel on water propelled by wind or by other means
	traverse or travel on (a body of water)