1. optical illusion due to atmospheric conditions.   mirage   nomenclature   pachyderm   quagmire   Hint Half-n-half Clue   2. stitching of parts at their edges; thread or wire.   suture   miasma   molecule   magnitude   Half-n-half Clue   3. bending of a ray of light due to change in density.   magnitude   vortex   symmetry   refraction   Half-n-half Clue   4. dependant or small heavenly body revolving round large one.   momentum   precipitant   quagmire   satellite   Half-n-half Clue   5. change of form, character or circumstances.   perimeter   miasma   metamorphosis   lumen   Half-n-half Clue   6. residue from smelting operation.   psychosis   slag   innovation   precipitant   Half-n-half Clue   7. finding the total or summary.   summation   turbulence   parasite   matrix   Half-n-half Clue