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cephaloglycin
n.
1.antibiotic related to cephalosporin but no longer in common use
 cephalochordate   cephalohematoma   cephalopod   cephalopod mollusk 

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exonerate
acquit; exculpate
I am sure this letter naming the actual culprit will exonerate you.
exorbitant exorcise exotic
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qualms
misgivings
His qualms of conscience had become so great that he decided to abandon his plans.
quandary quarantine quarry
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contagion
infection
Fearing contagion, they took drastic steps to prevent the spread of the disease.
contaminate contempt contend
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