sail vs tack

sail and tack both are nouns.

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

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

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

sail (noun)	tack (noun)
an ocean trip taken for pleasure	sailing a zigzag course
a large piece of fabric (usually canvas fabric) by means of which wind is used to propel a sailing vessel	(nautical) the act of changing tack
any structure that resembles a sail	a short nail with a sharp point and a large head
	gear for a horse
	(nautical) a line (rope or chain) that regulates the angle at which a sail is set in relation to the wind
	the heading or position of a vessel relative to the trim of its sails

sail (verb)	tack (verb)
travel on water propelled by wind	reverse (a direction, attitude, or course of action)
move with sweeping, effortless, gliding motions	fasten with tacks
travel on water propelled by wind or by other means	sew together loosely, with large stitches
traverse or travel on (a body of water)	fix to; attach
	create by putting components or members together
	turn into the wind