Synonyms of intermittent

2 Syllables
weekly, fitful, broken, checked, monthly, hourly, chainer, unquiet, rhythmic, cyclic, frequent, shifting, restless, serial
3 Syllables
iterant, punctuated, metrical, stop-and-go, piecemeal, inconstant, perpetual, rhythmical, sporadic, orbital, infrequent, cyclical, unfrequent, uneven, recurring, spasmodic, periodic, recurrent, centennial, changeful, spurtive, arrested, unpunctual, epochal, seasonal, hit-or-miss
4 Syllables
occasional, discontinuing, nonuniform, alternate, discontinuous, isochronous, irregular, periodical, never-ceasing, isochronal, interrupted
5 Syllables
iterative
6 Syllables
on-again-off-again