Synonyms of neutral

1 Syllable
greyest, greyer, gray, grayer, grayest, cool, calm, grey
2 Syllables
heather, whitest, hushhush, inert, asher, camels, easy, aloof, whiter, medium, beige, neutrals, taupe, stoical, mopish, camel, oyster, halfway, soso, cold-fish, listless, subdued
3 Syllables
half-hearted, diatonic, free-wheeling, peaceful, granite, iceberg, towheaded, fair-minded, unsocial, unbiased, nonchalant, neutralist, clinical, bystanding, middle-ground, halfhearted, unpledged, cinereal, detached, impartial, achromous, achromic, relaxed, collected, pacific, tow-haired, pale-faced, unslanted, ivory, colorless
4 Syllables
noncommittal, uninfluenced, unexcited, impersonal, even-handed, unconcerned, moderate, evenhanded, inactive, uninvolved, even-steven, uncommitted, middle-of-road, pacifistic, unaligned, unrevealing, unimpressed, unbothered, unaroused, peace-loving, poker-faced, peaceloving, peacemaking, placatory, noncombatant, achromatic, disengaged, free-spirited, fence-sitting, flaxen-haired, indifferent, nonpartisan, nonaligned, transitional, undecided
5 Syllables
unimpressible, intermediate, middle-of-the-road, nonbelligerent, inoffensive, unaffiliated, disinterested, disimpassioned, dispassionate, unprejudiced
6 Syllables
nonparticipating, nondiscriminating