Extra
Extra adverb - To a great degree.
Usage example: the children tried to be extra quiet while their mother was recovering
Somewhat
Somewhat adverb - To some degree or extent.
Both words in one sentence
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True Final Boss: The Cool Airship Final Boss can be somewhat considered this, as the fourth and final stage is an extra stage of sorts.
Source: Video Game / Razing Storm - Both ER and Friends have a character named Rachel Greene, with different ages but somewhat-similar personalities and sometimes-similar spellings (Friends never decided whether their Rachel officially had the extra E on the end of her surname or not).
Source: Names The Same / Live-Action TV - Although they're usually non-essential to the plot, explained later, or somewhat comprehensible on context alone, those who speak the languages in use will get something extra out of them.
Cite this Source
Somewhat and Extra. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/extra/somewhat
Extra & Somewhat. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/extra/somewhat>.
Somewhat or Extra. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/extra/somewhat.
Google Ngram Viewer shows how "extra" and "somewhat" have occurred on timeline