Synonyms for extensive

across-the-board, all-embracing, all-encompassing, all-inclusive, broad, capacious, complete, comprehensive, considerable, elaborate, encompassing, exhaustive, expansive, far-reaching, full, general, immeasurable, immense, in-depth, inclusive, large, pervasive, rampant, sizable, substantial, sweeping, thorough, total, ubiquitous, unlimited, vast, wholesale, wide, wide-ranging, widespread