Synonyms and related words :
absolute, ambiguous, apodictic, apparent, bound, categorical, certain, clean-cut, clear, clear and distinct, clear as crystal, clear as day, clear-cut, coherent, conclusive, connected, consistent, crisp, crystal, crystal-clear, crystalline, decisive, defined, definite, definitive, determinate, direct, distinct, evident, explicit, express, ineluctable, inevitable, limpid, loud and clear, lucid, luminous, manifest, necessary, obscure, obvious, palpable, patent, pellucid, perfectly sure, perspicuous, plain, positive, predestined, predetermined, simple, specific, straightforward, sure, sure-enough, translucent, transparent, transpicuous, TRUE, unconfused, unequivocal, univocal, unmistakable, well-defined