second phase - set of support
- semi-steep
- semi-troughed belt conveyer
- semiactive volcano
- semianthracite
- semiarid
- semiarid climate
- semiautomatic instrument
- semiautomatic interpolation
- semibituminous
- semiboggy soil
- semiboghead
- semibolson
- semibright coal
- semicaldera
- semicannel coal
- semicell
- semiconductor material
- semiconsolidated
- semicrystalline
- semidesert