Let conscience be a thousandfold witness.
Source: tatoeba (11039641)
Ranked by relevance and common usage.
Keep "thousandfold" 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 "thousandfold" 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 "thousandfold", 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 "thousandfold" 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.
Let conscience be a thousandfold witness.
Source: tatoeba (11039641)
The changes to the algorithm resulted in a thousandfold increase in efficiency, earning the engineer a small brass plaque.
Source: wiktionary
[T]he fresh brave school-life, so full of games, adventures, and good fellowship, so ready at forgetting, so capacious at enjoying, so bright at forecasting, outweighed a thousandfold their troubles with the master of their form, and the occasional ill-usage of the big boys in the house.
Source: wiktionary
Looking into his eyes, you seemed to see there the yet lingering images of those thousand-fold perils he had calmly confronted through life.
Source: wiktionary
Closest matches include extreme, immense, manyfold, multifold, multiplied by a thousand.
Compare the replacement against real sentence context. This entry includes sample sentences so you can check tone, grammar, and meaning before swapping words.