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.
ARE - Second-person singular simple present tense of be.
EAR - The organ of hearing, consisting of the pinna, auditory canal, eardrum, malleus, incus, stapes and cochlea.
ERA - A time period of indeterminate length, generally more than one year.
PAR - By; with.
PEA - A plant, member of the legume (Fabaceae) family.
PER - For each.
REP - Short form of reputation.
ERR - To make a mistake.
PAIR - Two similar or identical things taken together; often followed by of.
PEAR - An edible fruit produced by the pear tree, similar to an apple but elongated towards the stem.
PIER - A raised platform built from the shore out over water, supported on piles; used to secure, or provide access to shipping; a jetty.
RARE - Cooked very lightly, so the meat is still red (in the case of steak or beef in the general sense).
REAR - To raise physically; to lift up; to cause to rise, to elevate.
RIPE - Ready for reaping or gathering; having attained perfection; mature; -- said of fruits, seeds, etc.; as, ripe grain.
REAP - To cut with a sickle, scythe, or reaping machine, as grain; to gather, as a harvest, by cutting.
PARE - To remove the outer covering or skin of something with a cutting device, typically a knife.
RIPER - Comparative form of ripe: more ripe.
RAPIER - A slender, straight, sharply pointed sword (double-edged, single-edged or edgeless).
REPAIR - The act of repairing something.