" vastly "

1: to a great degree;

  * e.g., " ... the team has vastly improved in the course of the season "

•  Synonyms : 

•  achingly,

•  almighty,

•  archly,

•  awful,

•  awfully,

•  badly,

•  beastly,

•  blisteringly,

•  bone,

•  colossally,

•  corking,

•  cracking,

•  damn,

•  damned,

•  dang,

•  deadly,

•  desperately,

•  eminently,

•  enormously,

•  especially,

•  ever,

•  exceedingly,

•  extra,

•  extremely,

•  fabulously,

•  fantastically,

•  far,

•  fiercely,

•  filthy,

•  frightfully,

•  full,

•  greatly,

•  heavily,

•  highly,

•  hugely,

•  immensely,

•  incredibly,

•  intensely,

•  jolly,

•  majorly,

•  mightily,

•  mighty,

•  monstrous,

•  mortally,

•  most,

•  much,

•  particularly,

•  passing,

•  rattling,

•  real,

•  really,

•  right,

•  roaring,

•  roaringly,

•  seriously,

•  severely,

•  so,

•  sore,

•  sorely,

•  spanking,

•  specially,

•  stinking,

•  such,

•  super,

•  supremely,

•  surpassingly,

•  terribly,

•  that,

•  thumping,

•  too,

•  unco,

•  uncommonly,

•  very,

•  vitally,

•  way,

•  whacking,

•  wicked,

•  wildly

•  Antonyms : 

•  little,

•  negligibly,

•  nominally,

•  slightly,

•  somewhat

2: to a large extent or degree;

  * e.g., " ... vastly underestimated the cost of advertising the new product "

•  Synonyms : 

•  astronomically,

•  big-time,

•  broadly,

•  colossally,

•  considerably,

•  enormously,

•  extensively,

•  greatly,

•  highly,

•  hugely,

•  largely,

•  massively,

•  monstrously,

•  monumentally,

•  much,

•  sizably,

•  staggeringly,

•  stupendously,

•  tremendously,

•  utterly

•  Antonyms : 

•  little,

•  negligibly,

•  nominally,

•  slightly

1: unusually large;

  * e.g., " ... a vast expanse of land just waiting to be settled "

•  Synonyms : 

•  astronomical,

•  Brobdingnagian,

•  bumper,

•  colossal,

•  cosmic,

•  cyclopean,

•  elephantine,

•  enormous,

•  galactic,

•  gargantuan,

•  giant,

•  gigantesque,

•  gigantic,

•  grand,

•  herculean,

•  heroic,

•  Himalayan,

•  huge,

•  humongous,

•  immense,

•  jumbo,

•  king-size,

•  leviathan,

•  mammoth,

•  massive,

•  mega,

•  mighty,

•  monster,

•  monstrous,

•  monumental,

•  mountainous,

•  oceanic,

•  pharaonic,

•  planetary,

•  prodigious,

•  super,

•  super-duper,

•  supersize,

•  supersized,

•  titanic,

•  tremendous,

•  vasty,

•  walloping,

•  whacking,

•  whopping

•  Antonyms : 

•  bantam,

•  bitty,

•  diminutive,

•  infinitesimal,

•  Lilliputian,

•  little bitty,

•  micro,

•  microminiature,

•  microscopic,

•  midget,

•  miniature,

•  minuscule,

•  minute,

•  pocket,

•  pygmy,

•  teensy,

•  teensy-weensy,

•  teeny,

•  teeny-weeny,

•  tiny,

•  wee