1. unit for measuring weight of gems and purity of gold.   carat   humus   correlation   fauna   Hint Half-n-half Clue   2. agent to speed up chemical reaction without it changing.   catalyst   autopsy   floe   friction   Half-n-half Clue   3. cutting for analysis or examination.   cipher   diminution   dissection   homeostasis   Half-n-half Clue   4. eye disorder leading to partial blindness; waterfall.   cataract   congruence   fusion   aureole   Half-n-half Clue   5. substance formed by decay of organic material.   humus   balm   congruence   chameleon   Half-n-half Clue   6. swirling motion of water or air.   dichotomy   fusion   analogy   eddy   Half-n-half Clue   7. something taken for granted or usurping authority.   equinox   assumption   anesthetic   astigmatism   Half-n-half Clue