Answer: oxymorons

AnswerCrossword Clue
OXYMORONS

Civil war et al.

OXYMORONS

Deafening silence and bittersweet

OXYMORONS

"Jumbo shrimp," etc.

OXYMORONS
"Guest host" and "solo concert"
OXYMORONS
"Jumbo shrimp" and "paid volunteer," e.g.
OXYMORONSSeemingly self-contradictory figures of speech
OXYMORONSPassive-aggressive and the like