Bow

Bow can mean:

(Rhyming with "no":)
 Bow (weapon), "bows and arrows"
 Bow (music), the bow used to play musical instruments
 A type of knot which has two large loops.  It is used to tie simple things such as apron strings, shoelaces, or ribbons on wrapped-up presents or for a fashion accessory in womens' hair.

(Rhyming with "now":)
 Bow (ship), the forward part of the hull of a ship or boat
 a gesture, see Bowing

People
 Clara Bow, an actress