Barren, Defenseless, Denuded, Disrobed
as mysterious as an echo
Abstruse, Alchemistic, Arcane, Astrological
as mute as tomb
Aphasiac, Aphasic, Aphonic, Muffled, Mum
as mum as an oyster
Bashful, Buttoned up, Clammed up
as muddy as sheep dogs
Addled, Bemired, Bespattered, Black, Blurred
as mournful as the grave
Anguished, Bereft, Cheerless, Depressed
as motionless as a corpse
Apoplectic, At a Standstill, At rest, Becalmed
as monotonous as the sea
Banausic, Blah, Boring, Colorless, Dreary
as mobile as humanity
Adaptable, Ambulatory, Changeable, Fluid, Free
as mischievous as a kitten
Arch, Artful, Bad, Bothersome, Damaging
as mild as a dove
Balmy, Benign, Benignant, Blah, Bland
as merry as spring
Amusing, Blithe, Blithesome, Boisterous, Boon
as merry as a lark
Amusing, Blithe, Blithesome, Boisterous, Boon
as merciless as ambition
Barbarous, Callous, Compassionless, Cruel
as merciless as Othello
Barbarous, Callous, Compassionless, Cruel