1. iridescent or displaying rainbow-like colors.   seismic   opalescent   serrated   molten   Hint Half-n-half Clue   2. pertaining to night.   metallurgical   viscous   nocturnal   tertiary   Half-n-half Clue   3. pertaining to glass and its characteristics.   vitreous   septic   soluble   toxic   Half-n-half Clue   4. with only one color.   myopic   theoretical   opaque   monochromatic   Half-n-half Clue   5. opalescent or displaying rainbow-like colors.   iridescent   precise   resilient   repellent   Half-n-half Clue   6. pertaining to a semi-fluid sticky consistency.   viscous   refractory   opalescent   omnivorous   Half-n-half Clue   7. pertaining to the body or physical.   refractory   kinetic   pungent   somatic   Half-n-half Clue