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Swindle + penny + assess, 11 letters
The desired mineral that is left after impurities have been removed from mined ore, 11 letters
Long-popular game show, 13 letters
Long-running TV show featuring match-makers, 13 letters
Bringing together military forces, 13 letters
Great and constant diligence and attention, 13 letters
Complete attention, 13 letters
Intense mental effort, 13 letters
The spatial property of being crowded together, 13 letters
Number of molecules of a substance in a given volume (expressed as moles/cubic meter), 13 letters
The strength of a solution, 13 letters
Increase in density, 13 letters
Optical-illusion creators, sometimes, 12 letters
The quality of having the same center (as circles inside one another), 13 letters