1. cancer-causing.   hermetic   impermeable   carcinogenic   infinitesimal   Hint Half-n-half Clue   2. infinitely small or very tiny.   aromatic   inverse   infinitesimal   indeterminate   Half-n-half Clue   3. of same kind or uniform.   aromatic   centrifugal   derivative   homogeneous   Half-n-half Clue   4. capable of being drawn into wire or flexible.   deciduous   astringent   ductile   finite   Half-n-half Clue   5. cold like ice.   impermeable   congruent   igneous   glacial   Half-n-half Clue   6. arranged in gradations (e.g., of difficulty).   derivative   analgesic   chronic   graduated   Half-n-half Clue   7. pertaining to the stars or spiritual.   centripetal   contiguous   calorific   astral   Half-n-half Clue