old (ld)adj. old·er, old·est

oldness n.
Synonyms: old, ancient, archaic, antediluvian, antique, antiquated
These adjectives describe what belongs to or dates from an earlier time or period. Old is the most general term: old lace; an old saying.
Antediluvian applies to what is extremely outdated: "a branch of one of your antediluvian families" (William Congreve).
Antiquated describes what is out of date, no longer fashionable, or discredited: "No idea is so antiquated that it was not once modern. No idea is so modern that it will not someday be antiquated" (Ellen Glasgow).

Synonyms Related Words Antonyms
1.
oldness - the opposite of youngness
age - how long something has existed; "it was replaced because of its age"

2.
staleness - having lost purity and freshness as a consequence of aging
youngness - the opposite of oldness

3.
obsoleteness, superannuation - the property of being out of date and not current

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