bitter, clever, common, cross, fond, highly, ill, often, open, pleasant, quickly, real, right, serious, solid, strict, stupid, vast, winning, wrong
... and asked for more examples seen in the wild. I just ran into one on Yahoo! Answers:
Fierce, Fiercer, Fiercest, are the last two even words?
Fiercer and fiercest just don't sound right to my ears. Shouldn't it be "fierce, more fierce and most fierce"? I heard these words used on the history channel and it is bothering me, they don't sound right.
It seemed so weird that I couldn't resist debunking it, along with a response that "fiercer" and "fiercest" are down to recent decline of the language. Actually, both words come with the highest credentials and a long history.
"Secure from Flames, from Envy's fiercer rage" - Alexander Pope, Essay on Criticism
"The fiercer the fight, still the fiercer we grow" - Robert Southey
"But what can shield my heart from fiercer love?" - James Boswell
"The storm grew fiercer and fiercer" - Defoe, Robinson Crusoe
"And hurl her thunderbolts with fiercer hand!" - Samuel Taylor Coleridge
"This continued, growing fiercer and fiercer" - Ulysses S Grant, Personal Memoirs
"wilder and wilder, and fiercer and fiercer" - Mark Twain, A Tramp Abroad
" I dealt too flippantly with the fiercer kind of Suffragette" - GK Chesterton
"The wind came through the tree fiercer and fiercer" - DH Lawrence, Sons and Lovers
"a Kanga was Generally Regarded as One of the Fiercer Animals" - AA Milne, Winnie-the-Pooh
"and the sun was fiercer every minute" - George Orwell, Burmese Days
"the strongest and the fiercest spirit" - Milton, Paradise Lost
"strike terror even into the fiercest creatures" - Robinson Crusoe again
"Madness - fiercest madness" - PB Shelley, Zastrozzi
"In one of the fiercest of these repeated assaults" - Gibbon, Decline and Fall of the Roman Empire
"At length the fiercest heart will quail" - Thoreau
"put on their fiercest looks to stare all comers out of countenance" - Dickens, Nicholas Nickleby
" his temper was of the hottest and fiercest" - Dickens again, The Mystery of Edwin Drood
"He had the bluest, fiercest, most pointed eyes" - DH Lawrence, The Rainbow
My case rests.