Synonyms of occasional

1 Syllable
few, rare, odd
2 Syllables
weekly, random, sparsest, special, scarce, scarcest, fewest, monthly, casual, scarcer, hourly, odd-lot, fewer, seldom, fluker, standout, sparser, rarest
3 Syllables
stop-and-go, iterant, subtilest, sporadic, orbital, infrequent, unfrequent, periodic, rarer, subtiler, centennial, specific, by-the-way, segmented, unpunctual, epochal, seasonal, unusual, especial, uncommon
4 Syllables
nonuniform, incidental, desultory, episodic, supervenient, picaresque, exceptional, exclusive, sometime, intermittent, irregular, particular
6 Syllables
on-again-off-again