| ecosystem(noun, system, complex, interaction) |
| nature(noun, environment, world, surroundings) |
| ecological system(expression, system, complex, interaction) |
| bionomics(noun, nature, environment, world, surroundings) |
| condition(noun, nature, environment, world, surroundings) |
| environment(noun, nature, world, surroundings) |
| life(noun, nature, environment, world, surroundings) |
| natural complex(expression, system, complex, interaction) |
| natural system(expression, system, complex, interaction) |
| world(noun, nature, environment, surroundings) |
| ambience(noun, nature, environment, world, surroundings) |
| complex(noun, group, system, interaction) |
| environs(noun, nature, environment, world, surroundings) |
| habitat(noun, nature, environment, world, surroundings) |
| interaction(noun, group, system, complex) |
| milieu(noun, nature, environment, world, surroundings) |
| surroundings(noun, nature, environment, world) |
| system(noun, group, complex, interaction) |
| group(noun, system, complex, interaction) |
| soil physics(expression, study, soil, physics) |