1. sleeplessness.   projectile   insomnia   log   vent   Hint Half-n-half Clue   2. band of colors formed when light passes though a prism.   spectrum   objective   torque   insomnia   Half-n-half Clue   3. unit for measuring light energy.   virus   stratum   lumen   spectrum   Half-n-half Clue   4. pointers or indications.   symbiosis   vent   indices   vertex   Half-n-half Clue   5. size or extent.   incline   pestle   residue   magnitude   Half-n-half Clue   6. incompatibility or lack of uniformity.   medium   objective   inconsistency   pachyderm   Half-n-half Clue   7. different form of an element.   marsupial   velocity   isotope   nomenclature   Half-n-half Clue