1. A year that is not a leap year
   - common year

Type of: twelvemonth, year, yr

• oil-hardened steel
• oil-industry analyst
• oil-rich seed
• oil-soluble
• oil-water interface
• oilbird
• oilcan
• oilcloth
• oiled
• oiler
• oilfield
• oilfish
• oiliness
• oilman
• oilpaper
• oilrig
• oilseed
• oilseed rape
• oilskin
• oilstone
• oilstove
• oily
• oink
• ointment
• Oireachtas