Credible, Innocuous, Inane, Arduous, Redress, Palliative, Elude, Sanguine, Resilient, Stilted, Melancholy, Eccentric, Problematic, Gullible, Dichotomy
ANSWER: They are all challenging vocabulary words that were answers on the March 2013 SAT
soar vs. abate vs. debate vs. about vs. abundant