Herculis

[Herodotes]

Rhetorical device where contrasting words are juxtaposed to give a feeling of balance. A-T---E--S

[Mickey_Blue]

  Antithesis

[Fibonacci]

You might find the follwoing crossword solver useful if you get stuck on further clues
http://www.allwords.com/solver.php

it searches for words based on known letters and length of word. You can then click on any solutions found to see the meaning of the word.