Adjective

• S: (adj) reasonable, sensible (showing reason or sound judgment) "a sensible choice"; "a sensible person"
• S: (adj) fair, fairish, reasonable (not excessive or extreme) "a fairish income"; "reasonable prices"
• similar to
• derivationally related form
• antonym
• W: (adj) immoderate [Indirect via moderate] (beyond reasonable limits) "immoderate laughter"; "immoderate spending"
• S: (adj) reasonable, sane (marked by sound judgment) "sane nuclear policy"
• similar to
• S: (adj) rational (consistent with or based on or using reason) "rational behavior"; "a process of rational inference"; "rational thought"
• see also
• similar to
• S: (adj) coherent, logical, lucid (capable 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"
• S: (adj) demythologized, demythologised (having mythical elements removed)
• S: (adj) intelligent, reasoning, thinking (endowed with the capacity to reason)
• S: (adj) reasonable, sane (marked by sound judgment) "sane nuclear policy"
• antonym
• derivationally related form
• W: (n) rationalness [Related to: rational] (the quality of being consistent with or based on logic)
• W: (n) rationality [Related to: rational] (the state of having good sense and sound judgment) "his rationality may have been impaired"; "he had to rely less on reason than on rousing their emotions"
• derivationally related form
• antonym