Like someone else said on this thread; that's just security by obscurity, which is bad. Dictionary attacks will be one of the first (brute force related) attacks attackers will use because word passwords are incredibly popular (though admittedly of fewer words: VeryBigDog34 etc..), and relatively easy to do. I agree that having the password across different devices is somewhat of a challenge with a password manager, but not impossible. My very long and complex password is all down to muscle memory by this point, I couldn't tell you what it is from memory.

Also you shouldn't use the same password on multiple things and if you don't use a password manager you will need to memorize a lot of different passwords.