Combining words from two lists

I'm experimenting and having a look at creating a randomizer from two lists.

$List = ’Red’,’Pink’,’Green’
$List1 = ’Warning’,’Election’,’Marriage’

What I'm looking to do is pick a random word from $List and $List1. I'm aware that you can pick from a singular with :

Get-Random -InputObject $List

However, I'm not quite sure how I would be able to grab from both lists and combine them.

My expected output would be:

RedMarriage

PinkWarning

GreenElection