Mammoth Uncensored Word List:
40 words ending with ve, 16 letters long

antihypertensive archconservative automanipulative cardioprotective contraindicative counterincentive counterintuitive counteroffensive electrosensitive enantioselective hypercompetitive indiscriminative interpenetrative magnetostrictive mechanoreceptive nonauthoritative noncommunicative nonconcatenative noncorroborative nondemonstrative nondeteriorative nondeterminative noninterrogative noninvestigative nonresuscitative nontranscriptive nontransgressive overapprehensive overconservative overillustrative philoprogenitive predeterminative radioinsensitive semiconservative semiquantitative supercompetitive ultracompetitive ultraprogressive unrepresentative vasoconstrictive