[princevegeta89]

Two words seem always worse than one in my point of view

[brianberns]

At least two syllables are easier than three. (And "OK Google" is particularly tongue-twisty due to the repeated "oh" sounds.)

[dragonwriter]

> And "OK Google" is particularly tongue-twisty due to the repeated "oh" sounds.

It doesn't have repeated vowel sounds unless you pronounce it something like "OK Go-Goal"

It has, in order, one "o", one "u", and one "ə".