Flat Adverbs List: Not having been able to find a comprehensive list of flat adverbs, I decided to build my own

Flat Adverbs List.md

• bad
• bright
• cheap
• clean
• clear
• close
• deep
• different
• easy
• even
• fair
• far
• fast
• fine
• flat
• hard
• high
• kind
• late
• long
• loud
• near
• quick
• right
• safe (dict)
• sharp
• slow
• soon
• straight
• sure
• tight
• tough
• wrong

Not flat, but also not -ly(?):

• however
• quite
• very
• fresh

Antiquated(?):

• dreadful
• exceeding
• grievous
• marvelous
• monstrous
• terrible
• wonderful