Synonyms of sustained

1 Syllable
long
2 Syllables
upheld, yearlong, helped, backed, longer, constant, chronic, longest
3 Syllables
perennial, continued, lingering, long-drawn-out, overlong, supported, protracted, retained, continuous
4 Syllables
unabated, operated, diffusive, ever-present, unabating
5 Syllables
uninterrupted