1. Someone who imposes (e.g. opinions on other people)
   - obtruder

Derived forms: imposers

• Ostryopsis
• Ostwald
• Ostwald's theory of indicators
• Ostyak
• Ostyak-Samoyed
• Oswald
• Oswald Spengler
• Oswald Veblen
• oswego tea
• Otaheite arrowroot
• Otaheite arrowroot starch
• otalgia
• Otaria
• Otaria Byronia
• Otariidae
• otc
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• Othello
• other
• other half
• other than
• otherness
• others