Answer:
1. a natural formation that resembles a dome - dome mountain
2. the substitution of an inoffensive expression for one that may offend - euphemism
3. formed by solidification of molten magma - igneous
4. the language of a particular group, profession, or activity - jargon
5. headwaiter, a shortened form of maitre d' hotel, literally master of the house - maitre d'
6. referring to a pronounced change caused by pressure, heat, and water that results in a more compact and more highly crystalline condition - metamorphic
7. formed by or from deposits of sediment - sedimentary
8. the application of a plaster-like product over wallboard in a manner that produces a different look - texturing