V1 - decision speed
Vr - rotate speed
V2 - EO-climbout speed
Vmcg - minimum speed in which youre controllable on the ground with one engine inop
Vmca - the same, but then in the air
Vmbe - max brake energy speed
Vmu - minimum unstick speed (lowest 'flyable' speed)
Veo - engine failure speed (in certification 3 secs before V1)
Vmo - Max operating speed
Mmo - Max operating mach
Vs - stall speed
Vs1g - 1g-stall speed
I'm sure I forgot to mention many!
P77