Featureless

a.

1.

Having no distinct or distinctive features.

Adj.

1.

featureless - lacking distinguishing characteristics or features; "the featureless landscape of the steppe"

abstract, amorphic, amorphous, anarchic, articulated, baggy, bare, barren, bland, blank, bleached, blobby, blurred, blurry, broad, catenated, ceaseless, chaotic, characterless, clear, collective, concatenated, confused, connected, constant, continual, continued, continuing, continuous, cyclical, devoid, direct, disorderly, empty, endless, formless, fuzzy, gapless, general, generalized, generic, hazy, hollow, immediate, inane, incessant, inchoate, indecisive, indefinite, indeterminate, inform, insipid, interminable, joined, jointless, kaleidoscopic, linked, lumpen, misty, monotonous, nebulous, neutral, never-ending, nondescript, nonspecific, nonstop, null, null and void, obscure, orderless, perennial, periodic, recurrent, repetitive, round-the-clock, running, seamless, serried, shapeless, smooth, stable, steady, straight, twenty-four-hour, unbroken, unceasing, uncharacterized, unclear, undefined, undifferentiated, unending, uniform, unintermitted, unintermittent, unintermitting, uninterrupted, unordered, unorganized, unrelieved, unremitting, unspecified, unstopped, vacant, vacuous, vague, void, white, wide, with nothing inside, without content