ADD - To join or unite, as one thing to another, or as several particulars, so as to increase the number, augment the quantity, or enlarge the magnitude, or so as to form into one aggregate. Hence: To sum up; to put together mentally.
APE - A primate of the clade Hominoidea, generally larger than monkeys and distinguished from them by having no tail.
DAD - A father, a male parent.
LAD - A boy or young man.
LAP - The loose part of a coat; the lower part of a garment that plays loosely; a skirt; an apron.
PAD - A flattened mass of anything soft, to sit or lie on.
PAL - A friend, buddy, mate, cobber, someone to hang around with.
PEA - A plant, member of the legume (Fabaceae) family.
DEAD - No longer living.
DEAL - A division, a portion, a share.
LEAD - A heavy, pliable, inelastic metal element, having a bright, bluish color, but easily tarnished; both malleable and ductile, though with little tenacity. It is easily fusible, forms alloys with other metals, and is an ingredient of solder and type metal. Atomic number 82, symbol Pb (from Latin plumbum).
LEAP - To jump from one location to another.
PALE - Light in color.
PLEA - An appeal, petition, urgent prayer or entreaty.
PLED - Simple past tense and past participle of plead.
PEAL - A loud sound, or a succession of loud sounds, as of bells, thunder, cannon, shouts, laughter, of a multitude, etc.
PALED - Simple past tense and past participle of pale.
PEDAL - A lever operated by one's foot that is used to control a machine or mechanism, such as a bicycle or piano.
PLEAD - To present an argument, especially in a legal case.
PADDLE - A two-handed, single-bladed oar used to propel a canoe or a small boat.