considerable

adjectives

large or relatively large in number or amount or extent or degree
"a considerable quantity"; "the economy was a considerable issue in the campaign"; "went to considerable trouble for us"; "spent a considerable amount of time on the problem"
considerable
antonym
inconsiderable
is similar to
enough to be estimated or measured
"appreciable amounts of noxious wastes are dumped into the harbor"
appreciable
is similar to
large in amount or extent or degree
"it cost a considerable amount"; "a goodly amount"; "received a hefty bonus"; "a respectable sum"; "a tidy sum of money"; "a sizable fortune"
goodish, goodly, healthy, hefty, respectable, sizable, sizeable, tidy
is similar to
(Southern or Midland) considerable
"it's a right smart distance"
right smart
is similar to
fairly large
"won by a substantial margin"
significant, substantial
see also
above average in size or number or quantity or magnitude or extent
"a large city"; "set out for the big city"; "a large sum"; "a big (or large) barn"; "a large family"; "big businesses"; "a big expenditure"; "a large number of newspapers"; "a big group of scientists"; "large areas of the world"
big, large