Work in progress. I welcome suggestions.
  1. Scud
    "I dated a girl on Tinder who scudded when she walked." A loud-sounding word that is the verb for how clouds move.
  2. Pulchritudinous
    "The dress she wore to her sister's wedding was downright pulchritudinous!" An ugly word that means beautiful.
  3. Halcyon
    "The halcyon fire burned." An unsettling word that means peaceful.