Accidentally
(Adjective)
Nonchalantly
(Adjective)
Synonyms:
  1. carelessly
  2. indifferently
  3. unconcernedly
  4. coolly
  5. unemotionally
  6. impassively
  7. reservedly
  8. offhandedly
  9. informally
  10. breezily
  11. unceremoniously
  12. plainly
  13. apathetically
  14. lackadaisically
Incidentally
(Adjective)
Synonyms:
  1. aimlessly
  2. inconstantly
  3. randomly
In an unconcerned manner
(Adverb)
Synonyms:
  1. nonchalantly

Words Related to Casually

Related words are words that are directly connected to each other through their meaning, even if they are not synonyms or antonyms. This connection may be general or specific, or the words may appear frequently together.