Concentrate
Concentrate verb - To increase the amount of (a substance in a mixture) by removing other substances.
Keep and concentrate are semantically related. In some cases you can use "Keep" instead a verb "Concentrate".
Keep
Keep verb - To mark with an appropriate practice, rite, or ceremony.
Concentrate and keep are semantically related. Sometimes you can use "Concentrate" instead a verb "Keep".
Both words in one sentence
-
The Glamour of the Elves is an active power they must concentrate on to keep it working.
Source: Glamour Failure -
One limitation he has is that he must constantly concentrate on an item to keep it moving, and his concentration fails after 5-7 seconds, or if he's terrified, or if he's being jounced around.
Source: Mind over Matter -
Nowhere Man, who is molecularly displaced and has to concentrate to keep his form, and then there's the Green Cigarette, the Human Vegetable, Envelope Girl, Front Page, and the Notional Man.
Source: Comicbook / Animal Man
Cite this Source
Keep and Concentrate. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/concentrate/keep
Concentrate & Keep. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/concentrate/keep>.
Keep or Concentrate. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/concentrate/keep.
Google Ngram Viewer shows how "concentrate" and "keep" have occurred on timeline