" rackety "

1: making loud, confused, and usually unharmonious sounds;

  * e.g., " ... anyone operating that rackety machine had better wear earplugs "

•  Synonyms : 

•  clangorous,

•  dinning,

•  discordant,

•  noisy

•  Antonyms : 

•  noiseless,

•  quiet,

•  silent,

•  soundless,

•  still

2: full of or characterized by the presence of noise;

  * e.g., " ... the once-familiar sight of a rackety newspaper office with reporters pounding away at typewriters "

•  Synonyms : 

•  clamorous,

•  clangorous,

•  clattering,

•  clattery,

•  noisy,

•  resounding,

•  uproarious

•  Antonyms : 

•  hushed,

•  noiseless,

•  quiet,

•  silent,

•  soundless,

•  stilled,

•  stilly