I'm writing a book and need to find good names for an other dimension earth names I already have Brobdingnagian, Pulchritudinous, Lissome, Plethora Sumptuous, Halcyon, Fugacious, Ephemeral, bodacious, Ailuro, Cynos, Demes, Denoue, Dulcet, Effloresce, Gambol, Halcyon, Lilt, Lithe, Moiety, Panacea, Panoply, Penumbra, Petrichor, Riparian, Scintilla, Sempiternal, Sussurous please no coping, I'd appreciate 100% unique names

Sounds to me like it is all about women. That is what your names indicate. Give us an idea of what the story is about.

Those are long and difficult to pronounce (and not unique). Wouldn't it be better to come up with original short names that maybe use only vowels or consonants or have a unique way of beginning or ending, perhaps with a character rather than a letter? Or use characters inside the name?

Geesh, how many do you need? Seems like you already have a lot, none of them interesting, unique, or easy to remember.

One thing to consider when writing a book. If you want people to be able to keep up with your story line, remember the main characters and places, then K.I.S.S.

Unique doesn't always mean impossible to pronounce, spell, or remember. Keep it simple if you want people to engage in what you write.