16
incidentally(adverb, randomly)
13
by chance(expression, idiom, intention, circumstance, chance 2)
13
carelessly(adverb, attitude, quietly, apparently, softly)
11
nonchalantly(adverb, leisurely, carelessly, calmly, thoughtlessly)
10
accidentally(adverb, circumstance, chance 2, accidentally)
9
easily(adverb, attitude, quietly, softly, gently)
8
haphazardly(adverb, accidentally)
7
indifferently(adverb, attitude, easily, lightly, simply)
7
randomly(adverb, intention)
6
informally(adverb, colloquially)
5
easy
4
plainly
4
unintentionally(adverb, intention, accidentally)
3
spontaneously
3
calmly(adverb, leisurely, sluggishly, unhurriedly, gradually)
3
unconcernedly
2
at random
2
coolly(adverb, calmly, indifferently, familiarly, nonchalantly)
2
fortuitously(adverb, intention)
2
lightly(adverb, easily, moderately, slightly, softly)
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APASmart Define. (2015). casually thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/casually/thesaurus/synonyms
ChicagoSmart Define. 2015. "casually thesaurus" https://smartdefine.org/casually/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, casually thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/casually/thesaurus/synonyms>.
MLASmart Define. "casually thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/casually/thesaurus/synonyms>