What is another word for indefatigability?

Need synonyms for indefatigability? Here's a list of similar words from our thesaurus that you can use instead.

The fact of continuing in an opinion or course of action in spite of difficulty or opposition
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“It is because of my own indefatigability in talking about talk about talk that they made me a Knight.”
The ability to sustain prolonged physical or mental effort
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