These are words that I have come across in real life situations and while watching dramas (which should be fairly obvious when looking at the words). I just noticed how similar they are in terms of spelling so pronunciation is key here!
In random order:
충전 charge (electric). If your phone settings are in Korean, the phone will say “충전 중” when charging.
천하 the whole country, state, empire (context specific)
전하 Your royal highness – specific for men (anyone watching 기황후 should know this one cough-cough)
그때 at that time, then
그대 a somewhat poetic way to say “you”. It will often be heard in songs.
I will probably come up with more examples, but this is a start.