| steadfastly(adverb, tenaciously, loyally, stalwartly) | |
| diligently(adverb, thoroughly, carefully, meticulously, resolutely) | |
| deliberately(adverb, severely, thoroughly, fully, precisely) | |
| firmly(adverb, absolutely, very, really, thoroughly) | |
| persistently(adverb, resolutely, tenaciously) | |
| steadily(adverb, resolutely) | |
| tenaciously(adverb, resolutely, tenaciously) | |
| tirelessly(adverb, resolutely, tenaciously) | |
| to the letter(expression, idiom, adverb, really, thoroughly) | |
| trustworthily(adverb, reliably) | |
| truthfully | |
| verbatim | |
| doggedly(adverb, resolutely, tenaciously) | |
| indefatigably(adverb, resolutely, tenaciously) | |
| obediently(adverb, piously, obediently) | |
| acquiescently(adverb, obediently) | |
| aspiringly(adverb, expect, hopefully, optomism) | |
| best regards(expression, idiom, respect, faith, sincerity) | |
| closely(adverb, just, thoroughly, precisely, carefully) | |
| compliantly(adverb, obediently) |
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| APA | Smart Define. (2015). faithfully thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/faithfully/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "faithfully thesaurus" https://smartdefine.org/faithfully/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, faithfully thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/faithfully/thesaurus/synonyms>. |
| MLA | Smart Define. "faithfully thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/faithfully/thesaurus/synonyms> |