Difference between Ephemeral and Impermanent

EPHEMERAL vs IMPERMANENT: NOUN

Something which lasts for a short period of time.
Anything short-lived, as an insect that lives only for a day in its winged form
Anything lasting but a day, or a brief time; an ephemeral plant, insect, etc.
Anything which lasts or lives but for a day or for a very short time, as certain insects.
Something, especially a plant, that is ephemeral.

Enduring a very short time
Having a short lifespan or a short annual period of aboveground growth. Used especially of plants.
Beginning and ending in a day; existing only, or no longer than, a day; diurnal.
Short-lived; existing or continuing for a short time only.
One of a group of neuropterous insects, belonging to the genus Ephemera and many allied genera, which live in the adult or winged state only for a short time. The larvæ are aquatic; -- called also day fly and May fly.
Lasting for a short period of time.
Existing for only one day, as with some flowers, insects, and diseases.
Usually dry, but filling with water for brief periods during and after precipitation.
Lasting a very short time
Lasting for a markedly brief time.

In zoology, lasting but one day; ephemeric; ephemerous.
Hence Existing or continuing for a very short time only; short-lived; transitory.
Also, rarely, ephemeric.
Synonyms Transient, fleeting, evanescent.

Brief, Seasonal, Volatile, Short, Mayfly, Perishable, Fragile, Fleeting, Short lived, Fugacious, Passing, Temporary, Transient, Transitory, Impermanent

Passing, Pro tempore, Pro tem, Makeshift, Acting, Improvised, Episodic, Terminable, Temporary, Transient, Temporal, Finite, Evanescent, Transitory, Ephemeral

Brief, Seasonal, Volatile, Short, Mayfly, Perishable, Fragile, Fleeting, Short lived, Fugacious, Passing, Temporary, Transient, Transitory, Impermanent

Passing, Pro tempore, Pro tem, Makeshift, Acting, Improvised, Episodic, Terminable, Temporary, Transient, Temporal, Finite, Evanescent, Transitory, Ephemeral

To keep track of ephemeral content that disappears.
We mostly solve this problem with ephemeral messages.
The ephemeral storage limit given to service containers.
Hunting wildlife in forest patches: an ephemeral resource.
By default, your public IP address is ephemeral.
The whole experience is so ephemeral and inconsequential.
The ephemeral message controller terminates the ephemeral message in response to the haptic contact.
One ephemeral key pair Only the initiator generates an ephemeral key pair.
Truth can be an ephemeral thing; A creek can be ephemeral if it disappears in the middle of summer.
Two ephemeral key pairs Each party generates an ephemeral key pair.

These states, while preferable to human life, are impermanent: even gods eventually die.
It was all so impermanent and made me feel a bit unsettled.
How do you conceive this, bhikkhus, is material form permanent or impermanent?
Asanas are impermanent forms or containers that help us focus our awareness.
Erotic heights are by their nature impermanent, chaotic, and fundamentally transgressive.
Buddhist belief in the impermanent and transitory nature of things.
The precious human birth that we have now is impermanent.
Its contents can be edited by users and are impermanent.
The earliest grave markers were impermanent wood fixtures.
Everything in life is impermanent and always changing.