The difference between Everlasting and Sempiternal

When used as adjectives, everlasting means lasting or enduring forever, whereas sempiternal means everlasting, eternal.

Everlasting is also noun with the meaning: an everlasting flower.

Everlasting is also adverb with the meaning: extremely.

check bellow for the other definitions of Everlasting and Sempiternal

Everlasting as an adjective:

Lasting or enduring forever; existing or continuing without end

Examples:

"synonyms: immortaeternal"
Everlasting as an adjective:

Continuing indefinitely, or during a long period; perpetual; sometimes used, colloquially, as a strong intensive.

Examples:

"this everlasting nonsense"
Everlasting as an adjective (philosophy):

Existing with infinite temporal duration (as opposed to existence outside of time).

Everlasting as a noun:

An everlasting flower.
Everlasting as a noun (historical):

A durable cloth fabric for shoes, etc.

Sempiternal as an adjective:

Everlasting, eternal.
Sempiternal as an adjective (philosophy):

Everlasting, that is, having infinite temporal duration (as opposed to eternal: outside time and thus lacking temporal duration altogether).