consistent (adj.)
- accordant
- affirmative
- agreeable
- alike
- answerable
- authoritative
- automatic
- balanced
- binding
- clean-cut
- clear
- clear-cut
- coexistent
- coexisting
- cogent
- coherent
- coincident
- coinciding
- commensurate
- compatible
- concordant
- concurring
- conformable
- conforming
- congenial
- congruent
- congruous
- connected
- consecutive
- consentaneous
- consentient
- consonant
- constant
- continuous
- cooperative
- correspondent
- corresponding
- crisp
- crystalline
- defined
- definite
- dependable
- devoted
- direct
- distinct
- equable
- equal
- equivalent
- even
- explicit
- express
- faithful
- firm
- flat
- good
- harmonious
- homogeneous
- immutable
- invariable
- joined
- just
- lawful
- legal
- legitimate
- level
- like-minded
- limpid
- logical
- loyal
- lucid
- luminous
- measured
- mechanical
- monolithic
- ordered
- orderly
- pellucid
- persistent
- perspicuous
- plain
- positive
- predictable
- proportionate
- reconcilable
- regular
- robotlike
- self-consistent
- sequent
- sequential
- serial
- simple
- smooth
- solid
- sound
- stable
- staunch
- steadfast
- steady
- straightforward
- substantial
- sufficient
- symbiotic
- sympathetic
- synchronized
- synchronous
- systematic
- tight
- translucent
- transparent
- true
- true-blue
- unambiguous
- unanimous
- unbroken
- unchangeable
- unchanged
- unchanging
- unconfused
- undeviating
- undifferentiated
- undiversified
- unequivocal
- unfailing
- uniform
- uninterrupted
- univocal
- unmistakable
- unruffled
- unswerving
- unvaried
- unvarying
- valid
- weighty
- well-defined
- well-founded
- well-grounded