Nouns

(n)tackthe heading or position of a vessel relative to the trim of its sails
(n)tacka short nail with a sharp point and a large head
(n)stable gear, saddlery, tackgear for a horse
(n)sheet, tack, mainsheet, weather sheet, shroud(nautical) a line (rope or chain) that regulates the angle at which a sail is set in relation to the wind
(n)tack, tacking(nautical) the act of changing tack
(n)tacksailing a zigzag course

Verbs

(v)tackfasten with tacks“tack the notice on the board”
(v)tack, wear roundturn into the wind“The sailors decided to tack the boat”, “The boat tacked”
(v)assemble, piece, put together, set up, tack, tack togethercreate by putting components or members together“She pieced a quilt”, “He tacked together some verses”, “They set up a committee”
(v)baste, tacksew together loosely, with large stitches“baste a hem”
(v)append, tag on, tack on, tack, hang onfix to; attach“append a charm to the necklace”
(v)interchange, tack, switch, alternate, flip, flip-flopreverse (a direction, attitude, or course of action)