1. large or extensive like the heavenly bodies.   amorphous   hazardous   feasible   astronomical   Hint Half-n-half Clue   2. existing from birth.   igneous   dynamic   congenital   centripetal   Half-n-half Clue   3. pertaining to the back (of an animal).   ductile   dorsal   heterodox   hermetic   Half-n-half Clue   4. of motive force or energetic.   convex   inverse   caustic   dynamic   Half-n-half Clue   5. tending to a center.   centripetal   astronomical   humid   abstract   Half-n-half Clue   6. next to or adjoining.   analgesic   contiguous   homogeneous   caustic   Half-n-half Clue   7. theoretical and not concrete.   dynamic   astral   abstract   congruent   Half-n-half Clue