Pennywort :: Pennywort (n.) A European trailing herb (Linaria Cymbalaria) with roundish, reniform leaves. It is often cultivated in hanging baskets..
Pennyworth :: Pennyworth (n.) A penny's worth; as much as may be bought for a penny.
Pennyworth :: Pennyworth (n.) Hence: The full value of one's penny expended; due return for money laid out; a good bargain; a bargain.