Obsolesce :: Obsolesce (v. i.) To become obsolescent.
Obsolescence :: Obsolescence (n.) The state of becoming obsolete.
Obsolescent :: Obsolescent (a.) Going out of use; becoming obsolete; passing into desuetude.
Obsolete :: Obsolete (a.) No longer in use; gone into disuse; disused; neglected; as, an obsolete word; an obsolete statute; -- applied chiefly to words, writings, or observances..
Obsolete :: Obsolete (a.) Not very distinct; obscure; rudimental; imperfectly developed; abortive.
Obsolete :: Obsolete (v. i.) To become obsolete; to go out of use.