1. An early period of development
   - youth

Type of: period, period of time, time period

• obtuse-angled triangle
• obtusely
• obtuseness
• obverse
• obvert
• obviate
• obviating
• obviation
• obvious
• obviously
• obviousness
• oca
• ocarina
• Occam
• Occam's Razor
• occasion
• occasional
• occasionalism
• occasionally
• occasions
• occident
• occidental
• occidentalise
• occidentalism
• occidentalize