Ranked by relevance and common usage.
Keep "brainpower" when the sentence already sounds natural, when a synonym would add unintended emphasis, or when readers need the most familiar wording. A synonym should clarify or sharpen the message, not simply make the sentence look more varied.
If two options seem close, choose the one that best matches the audience and purpose of the sentence.
Choose a synonym only if it keeps the core idea of "brainpower" intact in the sentence you are editing.
Check whether the replacement sounds more formal, casual, emotional, technical, or forceful than the original word.
Read the full sentence after the swap. Keep the synonym only when the sentence becomes clearer or more precise.
Review note: Synonym lists are ranked with lexical data and reviewed for practical writing value. Use the comparison notes, sentence evidence, and source labels together; a high-ranking synonym can still be wrong when the audience, register, or grammar changes.
After choosing a replacement for "brainpower", read the sentence once for meaning and once for rhythm. The best synonym should feel natural in the full sentence, not only accurate in a word list.
If the synonym makes the sentence slower, vaguer, or more dramatic than intended, keep "brainpower" or choose a simpler alternative from the closest-match group.
OpenGloss and ConceptNet supply richer edges like generalizations, collocations, and derivations.
4 total sentences available.
We spend virtually no concerted time or effort honing our intellectual fitness. Yet the study suggests that daily mental drills will have a lot more impact on our longevity and wellbeing than abdominal crunches and boring hours on the treadmill. The brainpower exercises we complete today can improve our mental agility as far as five years into the future. No workout at the gym can match that.
Source: tatoeba (12264091)
He applied his brainpower to the problem.
Source: wiktionary
I suspect the think tank lacks the brainpower to function effectively.
Source: wiktionary
“Brainpower rankings usually identify the usual suspects: college towns like Boston, Washington, D.C., and the San Francisco Bay area. And to be sure, these places generally have the highest per capita education levels.”
Source: wiktionary
Closest matches include mental capacity, acumen, brain, cognition, cognitive ability.
Compare the replacement against real sentence context. This entry includes sample sentences so you can check tone, grammar, and meaning before swapping words.