undifferentiated (adj.)

• abstract
• accordant
• agnate
• akin
• alike
• analogous
• articulated
• austere
• automatic
• balanced
• bare
• basic
• bland
• broad
• ceaseless
• chaste
• collective
• comparable
• connected
• consistent
• consonant
• constant
• continual
• continued
• continuing
• continuous
• correspondent
• corresponding
• cyclical
• direct
• elementary
• endless
• equable
• equal
• essential
• even
• featureless
• flat
• fundamental
• general
• generalized
• generic
• homely
• homespun
• homogeneous
• immediate
• immutable
• incessant
• indefinite
• indeterminate
• indiscernible
• indistinct
• indistinguishable
• indivisible
• interchangeable
• interminable
• invariable
• irreducible
• joined
• level
• linked
• measured
• mechanical
• mere
• monolithic
• monotonous
• nebulous
• neutral
• never-ending
• nonspecific
• nonstop
• ordered
• orderly
• parallel
• perennial
• periodic
• persistent
• plain
• primal
• primary
• pure
• recurrent
• regular
• repetitive
• robotlike
• round-the-clock
• running
• seamless
• serried
• severe
• similar
• simple
• single
• smooth
• spare
• stable
• standard
• stark
• steadfast
• steady
• stereotyped
• straight
• systematic
• unadorned
• unbroken
• unceasing
• unchangeable
• unchanged
• unchanging
• uncluttered
• undeviating
• undistinguishable
• undistinguished
• undiversified
• unending
• uniform
• uninterrupted
• unrelieved
• unremitting
• unruffled
• unspecified
• unvaried
• unvarying
• vague
• wide