Nappy
Part of speech: noun
Definition: An absorbent garment worn by a baby who does not yet have voluntary control of its bladder and bowels or by someone who is incontinent.
Part of speech: adjective
Definition: Having a nap (of cloth etc.). Of hair: tightly curled or twisted; frizzy (occasionally specifically in reference to Blacks' textured hair).
Diaper
Part of speech: noun
Definition: A textile fabric having a diamond-shaped pattern formed by alternating directions of thread.A towel or napkin made from such fabric.(Canada) An absorbent garment worn by a baby, or by someone who is incontinent.The diamond pattern associated with diaper textiles.
Part of speech: verb
Definition: To put diapers on someone.
Example sentence: Mothers of all ages delight in their children, but I don't know that, if I were younger, I would feel as acutely, profoundly, preciously grateful for every smile, squeal, and - yes - diaper blowout.