Firm
Firm adjective - Marked by the ability to withstand stress without structural damage or distortion.
Usage example: built on a firm foundation, so the house hasn't settled
Sound is a synonym for firm in stable topic. In some cases you can use "Sound" instead the word "Firm" as an adjective or a noun, when it comes to topics like solid, continue, strong.
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
Firm is a synonym for sound in complete topic. You can use "Firm" instead the word "Sound" as an adjective or a noun, if it concerns topics such as fit, solid, continue, strong.
Mutual synonyms
Both words in one sentence
-
While the group has always had a very firm grounding in Progressive Sludge metal, the sound has been shown to be fairly varied since inception.
Source: Music / The Ocean -
In Restraint, when Grace tries to rope in new clients by tricking them into thinking her mothers firm is bigger than it is, she takes three computers and puts on office background noise to make it sound like shes calling from a busy office.
Source: Series / The Good Wife -
That Mitchell and Webb Sound had a series of sketches called "Old Lady Job Justification Hearings," in which people have to explain what they do and "how it helps" before a panel of kind but firm old ladies.
Source: Traffic Wardens
Cite this Source
Sound and Firm. (2016). Retrieved 2022, August 18, from https://thesaurus.plus/related/firm/sound
Firm & Sound. N.p., 2016. Web. 18 Aug. 2022. <https://thesaurus.plus/related/firm/sound>.
Sound or Firm. 2016. Accessed August 18, 2022. https://thesaurus.plus/related/firm/sound.
Google Ngram Viewer shows how "firm" and "sound" have occurred on timeline