Word that has two diametrically opposed meanings (like this puzzle's eight theme entries)

Question:

Length:

Similar Crossword Questions:

It can follow the last word of this puzzle's theme entries
Word hidden in this puzzle's theme entries
Just making things up, or a synonym for a three-word phrase describing this puzzle's theme entries
Word that has two diametrically opposed meanings
Word that follows the first word of the theme entries
Act affectedly, and what this puzzle's theme entries do?
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Playoff series finale ... or an apt title for this puzzle considering the number and length of its theme entries
Pithy sayings (four well-known ones containing the circled word are the keys to unlocking this puzzle's theme)
Tone-Loc and Marky Mark and the Funky Bunch, e.g. ... or how this puzzle's theme entries might be described?
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Word before the first word in this puzzle's theme answers
This puzzle's theme entries
Word appearing before or after each word in the long theme entries
Angle (and a three-word hint to this puzzle's theme)
Like this answer, or a two-word description of this puzzle's theme
What this puzzle's theme entries take, vowel-wise
Second of a pair of letters swapped six times in this puzzle's theme entries
This puzzle's obvious theme word
Activity suggested by this puzzle's theme entries
"Lid" in each of this puzzle's theme entries
"Infections" inside this puzzle's theme entries
They're hidden in this puzzle's theme entries
Oxford American Dictionary's 2012 word of the year, and the key to this puzzle's theme
Quadrennial occasion celebrated by this puzzle's theme entries