A palindrome is a word, phrase, or number that can be read the same way backwards or forwards.   For example, RADAR is RADAR spelled backwards, and it gets you coming or going.

Palindromic Numbers:	1991,   232,   666,   040,   7117,   1223221
Palindromic Words:	kayak,   mom,   dad,   sis,   eve,   level,   tenet,   noon     nun,   pip,   deed,   pop,   eye,   ewe,   pup,   madam
Palindromic Phrases:	Star comedy by Democrats,   A Toyota,   Race Car,     Red roots to order,   Straw Warts,   Taco Cat
Palindromic Place Names:	Kanakanak (a town in Alaska),   Apollo, PA,     Wassamassaw (a swamp in SC),   Adaven, Nevada
Palindromic Commercial Products:	Civic,   Elle,     Yreka Bakery (in Yreka, CA)
Palindromic Names:	Anna,   Otto,   Hannah,   Bob,   Ada,     Lon Nol (Cambodian leader)
Palindromic Sentences:	Egad, an adage!     Sit on a potato pan, Otis!     Step on no pets.     Stella won no wallets.     A slut nixes sex in Tulsa.     Drat Saddam, a mad dastard!     Draw, O Caesar! Erase a coward!     Don did nod.

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Here are some additional palindromic sentences (where letters are the unit):

  John Taylor (1580 - 1653) is the author of the first English palindrome:
    "Lewd did I live & evil I did dwel."

  Mankind's first pickup lines:
    "Madam, I'm Adam."       or       "Madam, in Eden, I'm Adam."

  Napoleon:   "Able was I ere I saw Elba."

  Dmitri Borgmann:   "Pa's a sap."

  Dmitri Borgmann:   " Ma is as selfless as I am."

  Dmitri Borgmann:   "Was it a car or a cat I saw?"

  Howard Bergerson: (a double Palindrome!)
    "Rise to vote, sir.   Name now one man."

  Howard Bergerson:   "Niagara, O roar again!"

  Howard Bergerson:   "Sums are not set as a test on Erasmus."
    (translation: Arithmetic problems aren't used to test
    a student's knowledge of a Renaissance writer.)

  J.A. Lindon:   "Dennis and Edna sinned."

  Alastair Reid:
    "T. Eliot, top bard, notes putrid tang emanating, is sad.
    I'd assign it a name: 'Gnat-dirt upset on drab pot toilet."

  Leigh Mercer:   "A man, a plan, a canal -- panama!"

  "A man, a plan, a cat, a canal; panama?"

  "A man, a plan, a cat, a ham, a yak, a yam, a hat, a canal -- panama!"

  "Tara sees a rat."

  "Rats live on no evil star."

  "Dammit, I'm mad!"

  "Yo, banana boy!"

  "Do geese see God?"

  "A dog, a panic in a pagoda."

  "No lemons, no melon."

  "Was it a can on a cat I saw?"

  "Egad!   A base tone denotes a bad age."

  "Straw?   No, too stupid a fad.   I put soot on warts."

  "Ten animals I slam in a net."

  "Man, Eve let an irate tar in at eleven AM"

  "Marge lets Norah see Sharon's telegram."

  "He goddam mad dog, eh?"

  "Doc note, I dissent.   A fast never prevents a fatness.   I diet on cod."

  "A Toyota's a Toyota."

  "Neil, a trap!   Sid is part alien!"

  "Never odd or even."

  "A dog, a plan, a canal, pagoda."

  "Was it Eliot's toilet I saw?"

  "Go hang a salami, I'm a lasagna hog."

  "Swap God for a janitor, rot in a jar of dog paws."

  "No, sir, away! A papaya war is on!"

  "Eva, can I see bees in a cave?"

  "Red rum, sir, is murder."

  "A Toyota! Race fast... safe car: a Toyota"

  "Campus Motto: Bottoms up, Mac."

  "Lisa Bonet ate no basil."

  "God saw I was dog."

  "Tarzan raised a Desi Arnaz rat."

  "Cigar?   Toss it in a can, it is so tragic."

  "Oh, no!   Don Ho!"

  "Vanna, wanna V?"

  "Cain -- a maniac!"

  "Ed, I saw Harpo Marx ram Oprah W. aside."

  "Yo!   Bottoms up, U.S. motto, boy!"

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Here are some additional palindromic sentences (where words are the unit):

  "So patient a doctor to doctor a patient so."

  "Girl, bathing on a bikini, eyeing boy, finds boy eyeing bikini on bathing girl"

  "Odd men in drag may drag in men. Odd!"

  "You can cage a swallow, can't you, but you can't swallow a cage, can you?"