THESAURUS
Modify
abate, accommodate, adapt, adjust, adjust to, alter, ameliorate, amend, analyze, anatomize, assuage, atomize, better, box in, break up, change, chop logic, circumscribe, condition, convert, decrease, deform, denature, desynonymize, difference, differentiate, diminish, discriminate, disequalize, disjoin, distinguish, diversify, divide, fit, hedge, hedge about, improve, individualize, individuate, leaven, lessen, limit, lower, make a distinction, mark, mark off, mark out, meliorate, mitigate, moderate, modulate, mutate, narrow, overthrow, palliate, particularize, personalize, qualify, re-create, realign, rebuild, reconstruct, redesign, redo, reduce, refashion, refine a distinction, refit, reform, regulate by, remake, remodel, renew, reorganize, reorient, reshape, restrain, restrict, restructure, revamp, revise, revive, reword, rework, ring the changes, season, segregate, separate, set apart, set conditions, set limits, set off, sever, severalize, shift the scene, shuffle the cards, soften, specialize, split hairs, subvert, temper, tone down, transform, turn, turn the scale, turn the tables, turn the tide, turn upside down, vary, work a change, worsen
ROGET THESAURUS
Modify
Difference
VB
be different, differ, vary, ablude, mismatch, contrast, divaricate, differ toto coelo, differ longo intervallo, vary, modify, discriminate.
Change
VB
change, alter, vary, wax and wane, modulate, diversify, qualify, tamper with, turn, shift, veer, tack, chop, shuffle, swerve, warp, deviate, turn aside, evert, intervert, pass to, take a turn, turn the corner, resume, work a change, modify, vamp, superinduce, transform, transfigure, transmute, transmogrify, transume, metamorphose, ring the changes, innovate, introduce new blood, shuffle the cards, give a turn to, give a color to, influence, turn the scale, shift the scene, turn over a new leaf, recast, reverse, disturb, convert into.
Qualification
VB
qualify, limit, modify, leaven, give a color to, introduce new conditions, narrow, temper, waffle, quibble, hem and haw (be uncertain), equivocate (sophistry), depend, depend on, be contingent on (effect), allow for, make allowance for, admit exceptions, take into account, modulate, moderate, temper, season, leaven, take exception.