13
intimately(adverb, thoroughly, carefully, meticulously, faithfully)
12
nearly(adverb, near, just, thoroughly, roughly)
10
exactly(adverb, just, thoroughly, precisely, carefully)
9
close(adverb, near)
7
firmly(adverb, severely, thoroughly, strongly, carefully)
7
immediately(adverb, nearly)
7
narrowly(adverb, thoroughly, carefully, hardly, faithfully)
7
near(adverb, preposition, near)
7
tight
5
almost(adverb, near, just, roughly, nearly)
5
densely(adverb, tightly, neatly, thickly)
4
approximately(adverb, near, thoroughly, roughly, nearly)
4
carefully(adverb, just, happily, thoroughly, fully)
4
compactly(adverb, tightly, neatly, thickly, densely)
4
fast
4
literally
4
minutely(adverb, thoroughly, carefully, meticulously, faithfully)
4
nigh(adverb, near)
4
precisely
4
scrupulously(adverb, just, thoroughly, precisely, carefully)
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APASmart Define. (2015). closely thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/closely/thesaurus/synonyms
ChicagoSmart Define. 2015. "closely thesaurus" https://smartdefine.org/closely/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, closely thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/closely/thesaurus/synonyms>.
MLASmart Define. "closely thesaurus" 4 December 2015. Web. 20 September 2026. <https://smartdefine.org/closely/thesaurus/synonyms>