
Originally Posted by
Raymott
He's saying, no, they are not interchangeable. It's concerning that so many students believe there are a significant number of words that are interchangeable. There are not. (However, it's not 'regarding' that they believe this.)
In other words, of course there's a difference. One is the present participle of 'concern' and the other of 'regard'. These are completely different words with fundamentally different meanings, connotations and usages.
And this will be the answer for almost questions about two different words without context being "interchangeable".
PS: Oops, I notice bhai has answered you. I'd suggest that if two words "can't also be used interchangeably", then they aren't interchangeable.