Synonyms for Obsolete (same or very similar meaning)
WordNet sense 1 (old; no longer in use or valid or fashionable):
out-of-date, outdated, superannuatedWordNet sense 2 (no longer in use):
disusedWordNet sense 3 (not current or belonging to the present time):
noncurrentFrom the ODE community, based on WordNetadd/edit