| justly | |
| keenly(adverb, fast, sprightly, severely, intensely) | |
| laboriously(vigorously, earnestly, actively, hastily, carefully) | |
| like a bulldog(expression, idiom) | |
| like a leech(expression, idiom) | |
| like all get out(expression, idiom, vigorously, earnestly, hastily) | |
| like fury(expression, adverb, fast, intensely, fiercely) | |
| like the devil(expression, idiom, vigorously, earnestly, hastily) | |
| like the dickens(expression, idiom, vigorously, earnestly, hastily) | |
| madly(adverb, fast, sprightly, intensely, fiercely) | |
| manfully | |
| manifestly | |
| marry | |
| materially | |
| meanly(adverb, fast, sprightly, severely, intensely) | |
| meditatively | |
| mischievously | |
| miserable | |
| misery | |
| monstrously |
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| APA | Smart Define. (2016). seriously thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/seriously/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "seriously thesaurus" https://smartdefine.org/seriously/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, seriously thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/seriously/thesaurus/synonyms>. |
| MLA | Smart Define. "seriously thesaurus" 31 March 2016. Web. 23 September 2026. <https://smartdefine.org/seriously/thesaurus/synonyms> |