Key
How words are described
Both words in one sentence
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He usually sings at the higher end of his register and rather loudly, which puts a lot of strain on his voice, making him sound out of key, even though he's usually hitting notes.
Source: Memes / Music - Key word, almost: even it can't take the strain of Tsukune's full monster energy without cracking.
Source: Exact Words / Fan Works - The Judas Strain (2007) — Gray teams up once again with Seichan and Vigor to seek out the key to stopping a strange disease that has broken out aboard a cruise ship off the coast of Indonesia (where Monk is representing Sigma in the relief/investigation efforts) that threatens the entire world.
Source: Literature / Sigma Force
Cite this Source
Strain and Key. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/key/strain
Key & Strain. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/key/strain>.
Strain or Key. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/key/strain.
Google Ngram Viewer shows how "key" and "strain" have occurred on timeline