- Definitions|2
- Thesaurus|562
- Abbreviations|0
| indubitably(adverb, certainly) | |
| inflexibly | |
| intensely(adverb, fast, fiercely, violently, powerfully) | |
| invariantly | |
| irrefragably(adverb, certainly) | |
| irrefutably(adverb, certainly) | |
| keenly(adverb, fast, intensely, fiercely, violently) | |
| levelly | |
| obviously(adverb, certainly) | |
| perpetually | |
| plainly(adverb, certainly) | |
| pluckily(adverb, tenaciously) | |
| relentlessly(adverb, fast, intensely, fiercely, violently) | |
| reliably | |
| spiritedly(adverb, fast, intensely, fiercely, violently) | |
| stanchly | |
| statically | |
| stonily(adverb, tenaciously) | |
| studiously | |
| sturdily |
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| APA | Smart Define. (2015). steadfastly thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/steadfastly/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "steadfastly thesaurus" https://smartdefine.org/steadfastly/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, steadfastly thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/steadfastly/thesaurus/synonyms>. |
| MLA | Smart Define. "steadfastly thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/steadfastly/thesaurus/synonyms> |