Answer: traitors

AnswerCrossword Clue
TRAITORS

Julius and Ethel Rosenberg, by some accounts

TRAITORS

Vidkun Quisling and Benedict Arnold

TRAITORS

Turncoats

TRAITORS
Quislings
TRAITORS
Faithless ones.
TRAITORSBetrayers.
TRAITORSTurncoats.
TRAITORSArnold et al.
TRAITORSBetrayers
TRAITORS"Our fears do make us ...": Shak.
TRAITORSRats
TRAITORS... Gate (one end of London Bridge)
TRAITORSOccupants of the lowest circle of Dante's hell