Competitive Exams ...
One Word
Dictionary
imposter
n.
1.a person who makes deceitful pretenses
 impost   impostor   imposture   impotence 

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foil
contrast
In "Star Wars," dark, evil Darth Vader is a perfect foil for fair-haired, naive Luke Skywalker.
foist foliage foment
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annihilate
destroy
The enemy in its revenge tried to annihilate the entire population.
annotate annuity annul
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capillary
having a very fine bore
The changes in surface tension of liquids in capillary vessels is of special interest to physicists.
capitulate caprice capricious
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