Antonyms of adj noiseless

1 sense of noiseless

Sense 1
noiseless -- (making no sound; "th' inaudible and noiseless foot of time"- Shakespeare)

INDIRECT (VIA quiet) -> noisy -- (full of or characterized by loud and nonmusical sounds; "a noisy cafeteria"; "a small noisy dog")

Similarity of adj noiseless

1 sense of noiseless

Sense 1
noiseless -- (making no sound; "th' inaudible and noiseless foot of time"- Shakespeare)
       => quiet (vs. noisy) -- (free of noise or uproar; or making little if any sound; "a quiet audience at the concert"; "the room was dark and quiet")