A worn out Universal joint in the rear driveshaft.
Normally a bent wheel or tire out of balance.
Either your front end or your tires needs to be aligned.
The transmission is not shifting in and out of gear or your front joint is going bad
replace front brake rotors and pads.
Your front, left or right axle needs to be replaced.
Wheels require balancing.
have the tyre checked for balance
track bar needs to be replaced.
You need a steering stabalizer and if you have one it may need to be replaced.
Loose Motor Mounts
Bad tire, bent rim, warped rotors.....
Check all front end components for wear. Then check the engine and transmission mounts as the engine could be shifting and causing the shake.