transitoriness vs impermanence

transitoriness and impermanence both are nouns.

Word	Noun	Adjective	Verb	Adverb
transitoriness	Yes	No	No	No
impermanence	Yes	No	No	No

As nouns, impermanence is a hypernym of transitoriness; that is, impermanence is a word with a broader meaning than transitoriness:

transitoriness: an impermanence that suggests the inevitability of ending or dying
impermanence: the property of not existing for indefinitely long durations

Other hypernyms of transitoriness include impermanency.

transitoriness (noun)	impermanence (noun)
an impermanence that suggests the inevitability of ending or dying	the property of not existing for indefinitely long durations