30 entries under occasional topic. ×

22
periodic(adjective, exact, ordinary, usual, steady)
14
regular(adjective, steady, regular, routine, constant)
13
recurring(adjective, regular, irregular, routine, normal)
11
perennial(adjective, regular, routine, continuous, enduring)
11
periodical(noun, adjective, regular, irregular, routine)
9
cyclic(adjective, exact, ordinary, usual, steady)
8
alternate(adjective, regular, irregular, routine, other)
6
isochronal(adjective, regular, irregular, routine, repetition)
6
isochronous(adjective, regular, irregular, routine, repetition)
5
epochal(adjective, regular, irregular, routine, erratic)
5
routine(adjective, regular, persistent, continuous, lasting)
5
seasonal(adjective, regular, irregular, routine, erratic)
3
every other(expression, adjective, idiom, irregular, erratic)
1
at various times(expression, adjective, idiom, regular, routine)
1
by bits and pieces(expression, adjective, idiom, irregular, erratic)
1
centennial(adjective, regular, routine, sporadic, intermittent)
1
every once in a while(expression, adjective, idiom, regular, routine)
1
every so often(expression, adjective, idiom, regular, routine)
1
fluctuating(regular, routine, unreliable, variable, random)
1
here and there(expression, adjective, idiom, irregular, erratic)
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APASmart Define. (2015). recurrent thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/recurrent/thesaurus/synonyms
ChicagoSmart Define. 2015. "recurrent thesaurus" https://smartdefine.org/recurrent/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, recurrent thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/recurrent/thesaurus/synonyms>.
MLASmart Define. "recurrent thesaurus" 13 April 2015. Web. 26 September 2026. <https://smartdefine.org/recurrent/thesaurus/synonyms>