| middle ages(expression, period, history, stage, era) |
| modern era(expression, period, history, stage, era) |
| modern period(expression, period, history, stage, era) |
| nordic bronze age(expression, period, history, stage, era) |
| nordic stone age(expression, period, history, stage, era) |
| paleo-indian(noun, adjective, time, period, history) |
| paleolithic(noun, period, history, stage, era) |
| post-classic(noun, adjective, time, period, history) |
| post-classic stage(expression, period, history, stage, era) |
| post-medieval period(expression, period, history, stage, era) |
| pre-roman iron age(expression, period, history, stage, era) |
| progress(noun, development, growth, period, expansion) |
| stone age(expression, period, history, stage, era) |
| viking age(expression, period, history, stage, era) |
| woodland period(expression, period, history, stage, era) |
| developing(noun, progress, development, growth, period) |
| evolution(noun, progress, development, growth, period) |
| growth(noun, progress, development, period, expansion) |
| man(noun, development, world, humanity, mankind) |
| advance(noun, progress, development, growth, period) |