Synonyms of geriatric

1 Syllable
oap, gray, old
2 Syllables
hoary, eldest, tired, grizzled, oldish, senior, fossil, skilled, wasted, versed, aged, olden, ancient, infirm
3 Syllables
veteran, senile, elderly, gray-haired, impaired, exhausted, seasoned, mature, decrepit, enfeebled, matured, retiree
4 Syllables
experienced, inactive, venerable
5 Syllables
debilitated, superannuated