oldest

As adjectives the difference between oldest and youngest

is that oldest is superlative of old while youngest is superlative of young.

As a noun youngest is

youngest child in a family.

As adjectives the difference between oldest and smallest

is that oldest is (old) while smallest is (small).

As adjectives the difference between ancient and oldest

is that ancient is having lasted from a remote period; having been of long duration; of great age; very old while oldest is (old).

As a noun ancient

is a person who is very old.

As an adjective oldest

is (old).

As a noun youth is

(lb) the quality or state of being young.

Innate is a related term of oldest.

As adjectives the difference between innate and oldest

is that innate is inborn; native; natural; as, innate vigor; innate eloquence while oldest is (old).

As a verb innate

is to cause to exist; to call into being.

As a noun old

is age.

As an adjective oldest is

(old).

Initial is a related term of oldest.

As adjectives the difference between initial and oldest

is that initial is chronologically first, early; of or pertaining to the beginning, cause or origin while oldest is (old).

As a noun initial

is the first letter of a word or a name.

As a verb initial

is to sign one's initial(s), as an abbreviated signature.

Intrinsic is a related term of oldest.

As adjectives the difference between intrinsic and oldest

is that intrinsic is innate, inherent, inseparable from the thing itself, essential while oldest is (old).

As a noun intrinsic

is a built-in function that is implemented directly by the compiler, without any intermediate call to a library.

Beginning is a related term of oldest.

As adjectives the difference between beginning and oldest

is that beginning is (informal) of or relating to the first portion of some extended thing while oldest is (old).

As a noun beginning

is (uncountable) the act of doing that which begins anything; commencement of an action, state, or space of time; entrance into being or upon a course; the first act, effort, or state of a succession of acts or states.

As a verb beginning

is .