Synonyms of senile

1 Syllable
sick, weak, old
2 Syllables
eldest, doting, weakest, dotard, oldish, aged, feeble, ancient, weaker, infirm
3 Syllables
doddering, gray-haired, senescent, geriatric, slaphappy, shattered, decrepit, enfeebled, anile
4 Syllables
imbecile, delusional