Meaning : For a limitless time.
Example :
No one can live forever.
Brightly beams our Father's mercy from his lighthouse evermore.
Synonyms : eternally, everlastingly, evermore
Meaning : For a very long or seemingly endless time.
Example :
She took forever to write the paper.
We had to wait forever and a day.
Synonyms : forever and a day
Meaning : Without interruption.
Example :
The world is constantly changing.
Synonyms : always, constantly, incessantly, perpetually