* SHOULDN'T be acceptable, but are *

ENOWS : ENOW {enough=n} [n -S] : ENOUGHS
NUDER : NUDE being without clothing or covering [adj NUDER, NUDEST] : NUDELY [adv] / a nude figure [n -S]

ABOVES <above=n> [n] : ABOVE something that is above (in a higher place) [n -S]
BELOWS <below=n> [n] : BELOW something that is beneath [n -S]
LACKER to {lacquer=v} [v -ED, -ING, -S]
NUDEST <nude=adj> [adj]

EMPTIER one that {empties=v} [n -S]
ENOUGHS : ENOUGH a sufficient supply [n -S] : ENOWS
HERTZES <hertz=n> [n]
UNIQUER : UNIQUE existing as the only one of its kind; very unusual [adj UNIQUER, UNIQUEST] : UNIQUELY [adv] / something that is unique [n -S]
OPAQUER : OPAQUE impervious to light [adj OPAQUER, OPAQUEST] : OPAQUELY [adv] / to make {opaque=adj} [v OPAQUED, OPAQUING, OPAQUES]

EMPTIEST <empty=adj> [adj]
OPAQUEST : OPAQUE impervious to light [adj OPAQUER, OPAQUEST] : OPAQUELY [adv] / to make {opaque=adj} [v OPAQUED, OPAQUING, OPAQUES]
PLATINAS <platina=n> [n]
UNIQUEST [adj] : UNIQUE existing as the only one of its kind; very unusual [adj UNIQUER, UNIQUEST] : UNIQUELY [adv] / something that is unique [n -S]

ABSOLUTER [adj] : ABSOLUTE free from restriction [adj -LUTER, -LUTEST] / something that is absolute [n -S]
CHERUBIMS <cherub=n> [n] : CHERUB an angel [n -UBS or -UBIM or -UBIMS] : CHERUBIC [adj]

ABSOLUTEST [adj] : ABSOLUTE free from restriction [adj -LUTER, -LUTEST] / something that is absolute [n -S]
EXAHERTZES

GIGAHERTZES
KILOHERTZES
MEGAHERTZES
PETAHERTZES
TERAHERTZES

* List compiled from OWL2 + Long List by Rebecca Slivka