Is vodka the strongest drink there is?

I drank a full glass over a 30 minute period, it went down so smooth but next thing I knew I couldn't stand, the room was spinning and I puked, very powerful I thought

There is vodka and vodka. I've seen 40 proof "light vodka" and have a bottle of 192 proof Polish vodka in my liquor cabinet. That isn't quite the strongest. If you get the same brand (Spyritus) in Poland, it will be potato- (not grain-) based and will be 193 proof. That is stronger than any legal drinking alcohol.