Open English Wordnet
Adverbs
(r)everlastingly, eternally, forever, evermorefor a limitless time“no one can live forever”, “brightly beams our Father's mercy from his lighthouse evermore” (P.P.Bliss)
(r)forever, forever and a dayfor a very long or seemingly endless time“she took forever to write the paper”, “we had to wait forever and a day”
(r)constantly, always, forever, perpetually, incessantlyinvariably“the world is constantly changing”