tack vs mix up

tack is a noun but mix up is not a noun.

Word	Noun	Adjective	Verb	Adverb
tack	Yes	No	Yes	No
mix up	No	No	Yes	No

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

Other hyponyms of tack include comfit, confect, confection, confuse, jumble, reassemble, configure, compound, rig up.

tack (noun)	mix up (noun)
sailing a zigzag course
(nautical) the act of changing tack
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

tack (verb)	mix up (verb)
reverse (a direction, attitude, or course of action)	cause to be perplexed or confounded
fasten with tacks	assemble without order or sense
sew together loosely, with large stitches
fix to; attach
create by putting components or members together
turn into the wind