This is my brainchild.
Source: tatoeba (1590653)
Ranked by relevance and common usage.
Keep "brainchild" 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 "brainchild" intact in the sentence you are editing.
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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 "brainchild", 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.
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17 total sentences available.
This is my brainchild.
Source: tatoeba (1590653)
This is his brainchild.
Source: tatoeba (8401054)
Established by the U.S. Congress in 1846, the Smithsonian was the brainchild of James Smithson, a wealthy English chemist who left his estate to the United States for the establishment of an institution in the nation’s capital “for the increase and diffusion of knowledge.”
Source: tatoeba (9938040)
The entire project was the brainchild of a small group of visionaries.
Source: wiktionary
Showing 4 of 17 available sentences.
Closest matches include apparition, art object, art work, article, artifact.
Compare the replacement against real sentence context. This entry includes sample sentences so you can check tone, grammar, and meaning before swapping words.