Chord: Woah! This guitar chord is really hard to do!
("a group of (typically three or more) notes sounded together, as a basis of harmony.")
Cord: This cord needs to be plugged into this laptop.
("thin, flexible string or rope made from several twisted strands")
Cord + Chord in a sentence: That electric guitar chord was so loud the cord fried!
(not sure if this would actually happen lol)