" sizably "

1: to a large extent or degree;

  * e.g., " ... we need to sizably increase production if we want to finish this project on time "

•  Synonyms : 

•  astronomically,

•  big-time,

•  broadly,

•  colossally,

•  considerably,

•  enormously,

•  extensively,

•  greatly,

•  highly,

•  hugely,

•  largely,

•  massively,

•  monstrously,

•  monumentally,

•  much,

•  staggeringly,

•  stupendously,

•  tremendously,

•  utterly,

•  vastly

•  Antonyms : 

•  little,

•  negligibly,

•  nominally,

•  slightly

1: of a size greater than average of its kind;

  * e.g., " ... a sizable sum of money "

•  Synonyms : 

•  big,

•  biggish,

•  boxcar,

•  bulky,

•  considerable,

•  goodly,

•  grand,

•  great,

•  handsome,

•  hefty,

•  hulking,

•  husky,

•  large,

•  largish,

•  outsize,

•  oversize,

•  substantial,

•  tidy,

•  voluminous

•  Antonyms : 

•  bantam,

•  dinky,

•  dwarf,

•  dwarfish,

•  little,

•  puny,

•  shrimpy,

•  small,

•  smallish,

•  undersized

2: sufficiently large in size, amount, or number to merit attention;

  * e.g., " ... a sizable increase in attendance since the team began its winning streak "

•  Synonyms : 

•  biggish,

•  considerable,

•  good,

•  goodly,

•  handsome,

•  healthy,

•  largish,

•  major,

•  respectable,

•  significant,

•  substantial,

•  substantive,

•  tidy

•  Antonyms : 

•  inconsequential,

•  inconsiderable,

•  insignificant,

•  insubstantial,

•  negligible,

•  nominal