G'Mornin' Bro Bill!

Proper Term is "Nonce Word"...& yeah, Roger Miller was JMO "THE King of it"..if only for rhymin' "Purple" with "Maple Syrple".

SOME.."Quark" for instance, even go-on to Legitimacy..in Later-Life!

So..Google "Nonce Words" & check out "Logatome".."Sniglet"..and "Lexical Gap" for a Day-Brightner~

Sniglets, for-instance, are "Words that AREN'T in The Dictionary..but (like yours) SHOULD BE!"

Fun ones, like "Jocoseriously"..(for "Half Comic/Half Serious" Statements)..."Me-ist"..(For Big-Ego-People).."Vanquash/Smashticate" for Moments like defeating the Death Star in Star Wars..and my fave, "Fnord"..which I've yet to look up...was too-busy laughing.)

I'm Instantly-Fond of "Uniquer"...Good Luck with it, &..with any luck, it's SO Uniquer it's gonna find its way into Common Useage!

Best Wishes & a Big Guy-Hug,
Stan