Reasonable
Reasonable adjective - According to the rules of logic.
Usage example: his answer is perfectly reasonable
Sound is a synonym for reasonable in sensible topic. In some cases you can use "Sound" instead the word "Reasonable" as an adjective or a noun, when it comes to topics like behaviour, mental condition, rational, character trait. popular alternative
Sound
Sound adjective - According to the rules of logic.
Usage example: sound reasoning alone should tell you that the result is invalid
Reasonable is a synonym for sound in sensible topic. You can use "Reasonable" instead an adjective "Sound", if it concerns topics such as behaviour, mental condition, rational, reason. popular alternative
Mutual synonyms
Both words in one sentence
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In something of a subversion, the sound effect is actually reasonable - the sound of water dripping off the ceiling of the cave she and Lelouch are in.
Source: Sound Effect Bleep - It was intended for Rhinox to be a lot more reasonable about it, explaining exactly why he thought this now, but Richard Newman's delivery of the lines made him sound like he had gone insane.
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Mike, the sentient computer from The Moon Is a Harsh Mistress can make a reasonable judgment of a person's health, just from the sound picked up by a common telephone receiver.
Source: Super Senses
Cite this Source
Sound and Reasonable. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/reasonable/sound
Reasonable & Sound. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/reasonable/sound>.
Sound or Reasonable. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/reasonable/sound.
Google Ngram Viewer shows how "reasonable" and "sound" have occurred on timeline