Adjectives

(a)coherent, consistent, logical, orderedmarked by an orderly, logical, and aesthetically consistent relation of parts“a coherent argument”
(s)coherent, logical, lucidcapable of thinking and expressing yourself in a clear and consistent manner“a lucid thinker”, “she was more coherent than she had been just after the accident”
(a)coherent(physics) of waves having a constant phase relation
(s)coherent, tenacioussticking together“two coherent sheets”, “tenacious burrs”