Synonyms: able, active, athletic, big, capable, durable, firm, forceful, hard, hearty, heavy, mighty, muscular, reinforced, robust, rugged, secure, solid, sound, stout, steady, sturdy, tough, vigorous
as sharp as a knife
Synonyms: acute, fine, barbed, honed, pointed, pointy, tapered, alert, astute, bright, brilliant, clever, fast, observant, quick, savvy, smart, wise
as gentle as a lamb
Synonyms: affable, agreeable, amiable, compassionate, considerate, docile, easy, genial, humane, mellow, merciful, peaceful, lenient, quiet, softhearted, sympathetic, tame, temperate, tender, warmhearted
as flat as a pancake
Synonyms: flush, pancake, planar, plane
as cold as ice
You’re willing to sacrifice, our love.
Synonyms: Chilly, Freezing, Siberian, Algid, Below freezing
as blind as a bat
completely blind
as dry as a popcorn fart
My Dad always says this and it cracks me up
as rare as a fat postman
From http://www.freerepublic.com/focus/news/814495/posts
as graceful as a cat
“She walks as gracefully and elegantly as a cat.”
flopping like a fish on a line
I’ve always liked this one
as stiff as a frozen fish
From Raymond Chandler’s “The Man Who Liked Dogs”