noiseless

• POS: Adjective
• HYPHEN: noise=less

CIDE DICTIONARY

noiseless, a. 

 Making, or causing, no noise or bustle; without noise; silent; as, the noiseless foot of time.  [1913 Webster]
"So noiseless would I live."  [1913 Webster]

OXFORD DICTIONARY

noiseless, adj.
1 silent.
2 making no avoidable noise.

Derivative

noiselessly adv. noiselessness n.

THESAURUS

noiseless

damped, dampened, deadened, echoless, hush, hush as death, hushed, inaudible, mousy, muffled, mute, muted, quiescent, quiet, silent, soft, soundless, still, still as death, stilly, subaudible, unarticulated, unhearable, unpronounced, unsounded, unuttered, unvocalized, unvoiced, whist

ROGET THESAURUS

noiseless

Silence

N silence, stillness, peace, hush, lull, muteness, solemn silence, awful silence, dead silence, deathlike silence, silent, still, stilly, noiseless, soundless, hushed, mute, soft, solemn, awful, deathlike, silent as the grave, inaudible, silently, sub silentio, Int, hush!, silence!, soft!, whist!, tush!, chut!, tut!, pax!, be quiet!, be silent!, be still!, shut up!, chup!, chup rao!, tace!, one might hear a feather drop, one might hear a pin drop, so quiet you could hear a pin drop, grosse Seelen dulden still, le silence est la vertu de ceux qui ne sont pas sa, le silence est le parti le plus sar de celui se d_, silence more musical than any song, tacent satis laudant, better to be silent and thought a fool than to spe.