1. Repetition of same sense in different words
   "'a true fact' and 'a free gift' are pleonastic expressions"
   - redundant, tautologic, tautological

See also: pleonasm, prolix

• Oncorhynchus tshawytscha
• oncost
• Oncovin
• Ondaatje
• Ondatra
• Ondatra zibethica
• ondes martenot
• one
• one after another
• one after the other
• one and only
• one another
• one at a time
• one by one
• one C
• one dollar bill
• one hundred
• one hundred eighty
• one hundred fifteen
• one hundred fifty
• one hundred fifty-five
• one hundred five
• one hundred forty
• one hundred forty-five
• one hundred ninety