There seems to be at least 3 spellings for uabhasach- uamhasach +uamhasachd.
So "uamhasach" is just an older spelling of "uabhasach". The word "uabhasachd" (or uamhasachd ) means "terribleness" :)
"We are good. They are terrible." was rejected because I split it into two short sentences. How can one hear a comma? How long is a full stop, in speech?