| beginning(noun, adjective, characteristic, start, trial) |
| preliminary(adjective, characteristic, start, beginning, trial) |
| preparatory(adjective, characteristic, start, beginning, trial) |
| primary(adjective, characteristic, start, beginning, trial) |
| provisional(adjective, characteristic, start, beginning, trial) |
| beginning period(expression, time, beginning, period) |
| incipient stage(expression, time, beginning, period) |
| initial period(expression, time, beginning, period) |
| initial phase(expression, time, beginning, period) |
| initial stage(expression, time, beginning, period) |
| opening phase(expression, time, beginning, period) |
| setting stage(expression, time, beginning, period) |
| ending period(expression, time, end, period) |
| finishing period(expression, time, end, period) |
| starting(noun, adjective, characteristic, start, beginning) |
| test(noun, adjective, characteristic, trial, experiment) |
| trial(noun, adjective, characteristic, experiment) |
| anterior(adjective, characteristic, start, beginning, introduction) |
| basic(adjective, characteristic, start, beginning, introduction) |
| developmental(adjective, characteristic, trial, experiment) |