Sound
Sound adjective - Marked by the ability to withstand stress without structural damage or distortion.
Usage example: the shed looks flimsy, but it's actually surprisingly sound
Unbreakable and sound are semantically related. In some cases you can use "Unbreakable" instead an adjective "Sound".
Unbreakable
Unbreakable adjective - Impossible to break especially under ordinary usage.
Sound and unbreakable are semantically related. Sometimes you can use "Sound" instead an adjective "Unbreakable".
Both words in one sentence
-
Insubstantial Ingredients: The sound of a cat's footfall is one of several impossible ingredients in the unbreakable ribbon Gleipnir in Norse Mythology.
Source: Older Than Print -
Older Than Print: There is a Norse myth in which the dwarves made an unbreakable rope with ingredients such as the sound of a cat's footstep, fish breath and the beards of women.
Source: Insubstantial Ingredients -
Although it might sound like it, Eyes Are Unbreakable is not an inversion of this trope.
Source: Go for the Eye
Cite this Source
Unbreakable and Sound. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/sound/unbreakable
Sound & Unbreakable. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/sound/unbreakable>.
Unbreakable or Sound. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/sound/unbreakable.
Google Ngram Viewer shows how "sound" and "unbreakable" have occurred on timeline