I am going abroad.
I am going home.
but we say...
I am going to office.
I am going to US.
Why cant we say I am going office or I am going US.
Whats the grammatical logic behind such a usage?
The word "home" can be an adverb.
In those cases it's not a noun, like "office" or "church" or "school."
"Abroad" can also be an adverb.