Palindromes are words that can be read from left to right or right to left, the letters are symetric.
Palindromes can also be phrases / sentences:
A man, a plan, a canal, Panama!Leigh Mercer, Notes and Queries, 13 Nov. 1948
Rise to vote, sir.
Madam, I'm Adam.
Father; religious superior; in the Syriac, Coptic, and Ethiopic churches, a title given to the bishops, and by the bishops to the patriarch; a title given to Jewish scholars in the Talmudic period.<ref></ref>
The upper part of some upper garments (such as a shirt or jacket) that folds back at or near the neck to give the appearance of a collar. Unlike a collar, the rever is always formed from the same piece of fabric as the rest of the garment's bodice.
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Please note: the Wiktionary contains many more words - in particular proper nouns and inflected forms: plurals of nouns and past tense of verbs - than other English language dictionaries such as the Official Scrabble Players Dictionary (OSPD) from Merriam-Webster, the Official Tournament and Club Word List (OTCWL / OWL / TWL) from the National Scrabble Association, and the Collins Scrabble Words used in the UK (about 180,000 words each). LotsOfWords knows 480,000 words.