Synonyms of thin

Verb

1. thin, change state, turn: usage: lose thickness; become thin or thinner
2. thin, reduce, cut down, cut back, trim, trim down, trim back, cut, bring down: usage: make thin or thinner; "Thin the solution"
3. dilute, thin, thin out, reduce, cut, weaken: usage: lessen the strength or flavor of a solution or mixture; "cut bourbon"
4. reduce, melt off, lose weight, slim, slenderize, thin, slim down, change state, turn: usage: take off weight

Adjective

1. thin (vs. thick), bladed, capillary, hairlike, compressed, flat, depressed, diaphanous, filmy, gauzy, gauze-like, gossamer, see-through, sheer, transparent, vaporous, vapourous, cobwebby, filamentous, filiform, filamentlike, threadlike, thready, fine, light, hyperfine, paper thin, papery, ribbonlike, ribbony, sleazy, slender, tenuous, wafer-thin, narrow, thin#2, lean: usage: of relatively small extent from one surface to the opposite or in cross section; "thin wire"; "a thin chiffon blouse"; "a thin book"; "a thin layer of paint"
2. thin (vs. fat), lean, anorexic, anorectic, bony, cadaverous, emaciated, gaunt, haggard, pinched, skeletal, wasted, deep-eyed, hollow-eyed, sunken-eyed, gangling, gangly, lanky, lank, spindly, rawboned, reedy, reedlike, twiggy, twiglike, scarecrowish, scraggy, boney, scrawny, skinny, underweight, weedy, shriveled, shrivelled, shrunken, withered, wizen, wizened, slender, slight, slim, svelte, slender-waisted, slim-waisted, wasp-waisted, spare, trim, spindle-legged, spindle-shanked, stringy, wiry, wisplike, wispy, ectomorphic, thin: usage: lacking excess flesh; "you can't be too rich or too thin"; "Yon Cassius has a lean and hungry look"-Shakespeare
3. slender, thin, narrow (vs. wide): usage: very narrow; "a thin line across the page"
4. sparse, thin, distributed (vs. concentrated): usage: not dense; "a thin beard"; "trees were sparse"
5. thin (vs. thick), tenuous, rare, rarefied, rarified: usage: relatively thin in consistency or low in density; not viscous; "air is thin at high altitudes"; "a thin soup"; "skimmed milk is much thinner than whole milk"; "thin oil"
6. thin (vs. full), pale: usage: (of sound) lacking resonance or volume; "a thin feeble cry"
7. thin, spiritless (vs. spirited): usage: lacking spirit or sincere effort; "a thin smile"
8. flimsy, fragile, slight, tenuous, thin, insignificant (vs. significant), unimportant: usage: lacking substance or significance; "slight evidence"; "a tenuous argument"; "a thin plot"; a fragile claim to fame"