Gypsum salt
Source: This question is taken from the Everyday Science
Epicenter
Quick Silver
Geo-morphology
Niacin
Saros Cycle
radio active gas
Thiamine
Metrology
Phycology
Astronomy
Maria, or seas, even though there is no water on the Moon
Magnesium Sulfate
Both A & B
Fissionable
Karman line
Cryosphere
Acclimatization
Retinene
sublimation
Pure-Conductor
plasma
Volatile
Stellar nurseries
Arboreal