GRE

coeval - living at the same time as; contemporary

cogent - convincing :: convincing

cogitate - think over

cognate - related linguistically; allied by blood; similar or akin in nature

cognitive - having to do with knowing or perceiving related to the mental precesses

cognizance - knowledge

cog - tooth projecting from a wheel

cohere - stick together

cohesion - tendency to keep together

cohorts - armed band

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