<p>I am plagued by a major case of insomnia, so I will give you a list of a few diction/redundancy words I've seen tested on real tests off the top of my head.</p>
<p>corroborate (never seen this in test prep books)
collaborate</p>
<p>proceed (popped up twice in two recent tests)
precede</p>
<p>desirous
desirable</p>
<p>audible
auditory (still don't know when to use auditory)</p>
<p>prospective
perspective</p>
<p>imminent
eminent</p>
<p>ensure (very tricky one that most missed)
assure (still don't know difference)
insure?</p>
<hr>
<p>redundancy</p>
<p>return, not return back</p>
<h2>annual, yearly (same)</h2>
<p>tricky prepositions/idioms</p>
<p>considered (sth) BY , not TO
She was considered precocious to her family members. (x)</p>
<p>put questions to (not towards)</p>
<p>in regards to (x)</p>
<p>in regard to
as regards
with regard to</p>