This was recently brought up here before. I remember adding to the list. Was it last year?
All of these are defense:
Gritz Blitz - 1977 Falcons
No-Name Defense - 70's Dolphins
Doomsday Defense - 70's Cowboys
Sack Pack - 1975-77 Colts
11 Angry Men - late 60's Raiders
Gang Green - 1987-90 Eagles
Gold Rush - 1976-77 9ers
Silver Rush - 1978(or 79)-80 Lions
Killer Bees - 1982 Dolphins
Bruise Brothers - Chargers 1979-80
Dome Patrol - 1987-89 Saints
Chris's Crew - 50s - 60s Lion DBs
There's was some talk over the original 4 getting the Fearsome Foursome name between Rams, Chargers, Giants and Lions but it stuck with the Rams and they're more famous for it.
https://nflfootballjournal.blogspot.com/2018/12/who-was-nfls-first-fearsome-foursome.html
I think for a few of these teams it was just media verbiage to talk about a front 4 and the Rams ended up making it permanent.