old

aged ancient decrepit elderly gray mature tired venerable

fossil senior versed veteran

along in years broken down debilitated enfeebled exhausted experienced geriatric getting on gray-haired grizzled hoary impaired inactive infirm matured not young olden oldish over the hill past one's prime seasoned senile skilled superannuated wasted

new young youthful

green inexperienced

contemporary current fresh late modern recent up-to-date

age-old antique crumbling former old-fashioned old-time original outmoded primitive traditional venerable

aboriginal antediluvian bygone past relic remote

antiquated archaic cast-off dated decayed done démodé early erstwhile hackneyed immemorial late moth-eaten of old of yore olden oldfangled once onetime out-of-date passé primeval primordial pristine quondam rusty sometime stale superannuated time-worn unfashionable unoriginal worn-out

current fresh modern new present up-to-date

contemporary recent young youthful

age-old established familiar

constant firm perennial solid steady versed veteran vintage

continuing enduring experienced hardened inveterate lifelong long-lasting long-lived of long standing perpetual practiced skilled staying time-honored

broken changeable green inexperienced intermittent interrupted soft unstable unsteady untrustworthy wavering weak

contemporary current fresh late modern new recent up-to-date young youthful