The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

...to detect slow-moving monopoles
at the MAGNETIC north pole?
The Big Bang Theory Season 2, Episode 23

...we were looking for MAGNETIC monopoles
and not finding anything...
The Big Bang Theory Season 3, Episode 1

♪ We're like changing
electric and MAGNETIC fields ♪
The Big Bang Theory Season 7, Episode 6

But if I'm able to detect slow-moving
MAGNETIC monopoles there...
The Big Bang Theory Season 2, Episode 23

No, this is to train for a three-month
expedition to the MAGNETIC north pole.
The Big Bang Theory Season 2, Episode 23