Oneirocriticaustic: an adjectival portmanteau of “oneirocritica” and “caustic,” its first usage was in forums online featuring correspondence between prominent psychoanalysts such as Dalton Frumbo and Samuel Pochram.
Eunoia: a noun referring to a well mind or beautiful thinking.
Fleurosia: a floral state of Being (à la German philosopher Martin Heidegger), Germanic in meaning* but somehow both French and Greek in origin.
There are many words that fit the single criterion of having all five vowels; this list of three contains just one that can be found in a dictionary.
*German provides us with numerous words describing specific and peculiar phenomena. Instances include Schadenfreude—pleasure at another’s suffering—and Treppenwitz—the pick-up joke remembered only after the moment to use it has passed. German borrowed from other languages to create Fleurosia, but it can be properly understood only through the filter of an ontology like Heidegger’s.
With care,
~ Grigori