"Immortal" is a word that describes something that cannot die or is everlasting. However, there are many synonyms that can be used to describe the same concept. One such word is "eternal," which is often used to describe something that is never-ending or timeless. Another word that can be used as a synonym for "immortal" is "ageless," which describes something that appears to never age or grow old. Another synonym is "everlasting," which can be used to describe something that will last forever. Finally, "enduring" is another synonym for "immortal" that is used to describe something lasting for a long time or being able to withstand the test of time.