Er1. (n.) The termination of many English words, denoting the agent; -- applied either to men or things; as in hater, farmer, heater, grater. At the end of names of places, -er signifies a man of the place; as, Londoner, i. e., London man.
2. (n.) A suffix used to form the comparative degree of adjectives and adverbs; as, warmer, sooner, lat(e)er, earl(y)ier.
Thesaurus Entries
A, Ag, Al, Am, Ar, As, At, Au, B, Be, Bi, C, Ca, Cb, Cd, Ce, Ciceronian, Cl, Cm, Co, Cr, Cs, Cu, Demosthenian, Demosthenic, Dy, E, Er, Es, Eu, F, Fe, Fm, Fr, Ga, Gd, Ge, H, Ha, He, Hf, Hg, Ho, I, In, Ir, K, Kr, La, Li, Lu, Lw, Md, Mg, Mn, Mo, Mv, N, Na, Nb, Nd, Ne, Ni, No, O, Os, P, Pa, Pb, Pd, Pm, Po, Pr, Pt, Pu, Quaker-colored, Ra, Rb, Re, Rf, Rh, Rn, Ru, S, Sb, Sc, Se, Si, Sm, Sn, Sr, Ta, Tb, Tc, Te, Ti, Tl, Tm, Tullian, U, V, W, Yb, Zn, Zr, achroma, achromasia, achromatosis, acier, alabaster, albescence, albinism, albino, albinoism, aluminum, americium, and pence, antimony, argent, argentine, argon, arsenic, articulate, ashen, ashy, astatine, aureate, bar, barium, berkelium, beryllium, besnow, bismuth, blanch, bleach, blondness, boron, brass, brassy, brazen, bright, bromine, bronze, bronzy, bullion, burnished, cadmium, calcium, canescence, canescent, carbon, cash, cerium, cesium, chalk, chalkiness, chalky, chlorine, chromium, cinereous, cinerous, circulating medium, cobalt, coin gold, coin silver, coinage, coined liberty, cold cash, columbium, copper, coppery, creaminess, cretaceous, cupreous, cuprous, curium, currency, cutlery, dapple, dapple-gray, dappled, dappled-gray, dingy, dining utensils, dismal, dollars, dove-colored, dove-gray, dreary, driven snow, dulcet, dull, dusty, dysprosium, einsteinium, eloquent, emergency money, erbium, etiolate, euphonious, europium, facund, fairness, felicitous, fermium, ferrous, ferruginous, filthy lucre, flat silver, flatware, fleece, fleecy-white, flour, fluorine, foam, forks, fractional currency, francium, frost, frosted, frostiness, frosty, gadolinium, gallium, germanium, gilt, glaucescence, glaucescent, glaucous, glaucousness, gleaming, glib, gold, gold nugget, gold-filled, gold-plated, golden, gray, gray-black, gray-brown, gray-colored, gray-drab, gray-green, gray-spotted, gray-toned, gray-white, grayed, grayish, grey, griseous, grizzle, grizzled, grizzliness, grizzly