massive 20 antonyms and opposites of massive. Adjective — Extremely large in size, extent, or degree. Synonyms for massive bulky heavy hefty substantial weighty consequential meaningful overwhelming significant Antonyms for massive insubstantial light dwarf little microscopic midget minuscule pint-sized wee tiny inconsequential insignificant piddling trifling trivial unimportant stale lame disappointing massless ← Back to the full definition of massive
