Frank J. Wilstach, comp. A Dictionary of Similes. 1916.
Plain
Plain as A. B. C. Anonymous
Plain as a hat on a rack.
—Anonymous
Plain as a steeple.
—Anonymous
Plain as a pack-saddle.
—Anonymous
Plain as the shepherd nymph in russet weeds.
—Anonymous
Plain as two and two make four.
—Anonymous
Plain as your own miniken-breeches.
—Beaumont and Fletcher
As plain as noon-day.
—George H. Boker
She dresses as plain as the lily that modestly grows in the valley.
—Patrick Brontë
Plain as truth.
—George Chapman
Plain as a demonstration in Euclid.
—George Colman, the Younger
Her dress was as plain as an umbrella cover.
—Joseph Conrad
Plain as plainness.
—John Davies
As plain to everybody as the sun.
—Charles Dickens
As plain as water’s water.
—George Eliot
Plain as a pikestaff.
—Samuel Foote
Plain as a dropped egg on a plate of hash.
—Sewell Ford
Plain as the way to market.
—Benjamin Franklin
Plain as the sunlight.
—James Anthony Froude
As plain as the moral law.
—Bret Harte
Plain as the man with lantern.
—Thomas Hood
Plain as whisper in the ear.
—Thomas Hood
Plain as the record on the prophet’s scroll.
—Oliver Wendell Holmes
As plain as a hole in a grindstone.
—Oliver Wendell Holmes
As plain as the round shield of the sun blazing on high.
—James Huneker
Plain as print.
—Samuel Lover
Plaine … as the high way.
—John Lyly
Plain as the sun in heaven.
—Thomas Babington Macaulay
Plain … as a rudimentary sum in arithmetic.
—George Meredith
Plain as the light in the sun or as the man in the moon.
—Thomas Otway
Plain as a nose in a man’s face.
—François Rabelais
Plain as the plain bald pate of Father Time himself.
—William Shakespeare
Plain as way to parish church.
—William Shakespeare
Plain and smooth like a Quaker’s meeting.
—James Smith
Plain as the sun at noonday.
—Laurence Sterne
Plain as the glistening planets shine when winds have cleared the skies.
—Robert Louis Stevenson
Plain as a weed.
—Bayard Taylor