Synonyms of extensive

1 Syllable

huge, vast, lush, long, broad, great, big, wide

2 Syllables

heftier, bigger, huger, spreading, amplest, widest, spoter, rifer, far-flung, sweeping, hugest, lengthy, biggish, world-wide, all-round, outspread, greatest, copious, longest, roomier, in-depth, ringent, unshut, ampler, boundless, opens, masser, vastest, biggest, spacious, open, vaster, broadest, spread-out, fargoing, longer, wider, hulking, lusher, broader, worder, large, hefty, major, scopic, scopious, bulker, goodly, roomy, largish, goodliest, buller, blanket

3 Syllables

important, general, unplugged, pandemic, comprising, whole-hog, overlong, thorough-going, far-ranging, wide-reaching, broad-spectrum, catholic, overdrawn, expanded, extended, unbarred, patulous, unstopped, protracted, prevalent, dilatant, widespread, designless, stretched-out, immense, panoptic, massive, full-scale, wide-ranging, worldwide, sizable, commodious, capacious, far-reaching, dehiscent

4 Syllables

across-the-board, voluminous, unsectarian, inclusive, universal, wholesale, unburdened, embracive, uncluttered, exhaustive, pervasive, unrestricted, large-scale, decent-sized, expansive

5 Syllables

elephantine, imperceptive, considerable, encyclopedic, longitudinal, comprehensive, unmethodical, unselective, many-faceted, unexclusive, all-encompassing, immeasurable, all-inclusive, elaborate

6 Syllables

undiscriminating, indiscriminate