AIR - The atmospheric substance above the surface of the earth which animals breathe, formerly considered to be a single substance, one of the four basic elements of ancient philosophy and one of the five basic elements of Eastern traditions.
HIP - The outward-projecting parts of the pelvis and top of the femur and the overlying tissue.
NAP - A short period of sleep, especially one during the day.
PAN - A wide, flat receptacle used around the house, especially for cooking.
PAR - By; with.
PIN - A small device, made (usually) of drawn-out steel wire with one end sharpened and the other flattened or rounded into a head, used for fastening.
RAN - Simple past of run.
RAP - A sharp blow with something hard.
RIP - A tear (in paper, etc.).
NIP - A small quantity of something edible or a potable liquor.
PHI - The twenty-first letter of the Classical and Modern Greek, the twenty-second letter of Old and Ancient.
HAIR - A pigmented filament of keratin which grows from a follicle on the skin of humans and other mammals.
HARP - A musical instrument consisting of an upright frame strung with strings that are stroked or plucked with the fingers.
PAIN - An ache or bodily suffering, or an instance of this; an unpleasant sensation, resulting from a derangement of functions, disease, or injury by violence; hurt.
PAIR - Two similar or identical things taken together; often followed by of.
RAIN - Condensed water falling from a cloud.
HAIRPIN - Characterized by an abrupt or extreme bend; shaped like a hairpin.