eldest

As adjectives the difference between elderly and eldest

is that elderly is old; having lived for relatively many years while eldest is superlative of old; greatest in age or seniority.

As a noun elderly

is an elderly person.

As adjectives the difference between elder and eldest

is that elder is comparative of old: older, greater than another in age or seniority while eldest is superlative of old; greatest in age or seniority.

As a noun elder

is an older person or an older member, usually a leader, of some community.

As a proper noun Elder

is {{surname|lang=en}.

As adjectives the difference between first and eldest

is that first is preceding all others of a series or kind; the ordinal of one; earliest while eldest is superlative of old; greatest in age or seniority.

As an adverb first

is before anything else; firstly.

As a noun first

is the person or thing in the first position.

As adjectives the difference between eldest and primal

is that eldest is superlative of old; greatest in age or seniority while primal is being the first in time, or history.

As adjectives the difference between eldest and aboriginal

is that eldest is superlative of old; greatest in age or seniority while aboriginal is first according to historical or scientific records; original; indigenous; primitive.

As a noun aboriginal is

an animal or plant native to a region.

As a proper noun Aboriginal is

any of the native languages spoken by Australian aborigines.

is likely misspelled.

has no English definition.

As an adjective eldest

is superlative of old; greatest in age or seniority.

Wikidiffcom is likely misspelled.

Wikidiffcom has no English definition.

As an adjective eldest is

superlative of old; greatest in age or seniority.

As adjectives the difference between original and eldest

is that original is relating to the origin or beginning; preceding all others while eldest is superlative of old; greatest in age or seniority.

As a noun original

is an object or other creation (e.g. narrative work) from which all later copies and variations are derived.

As adjectives the difference between eldest and maiden

is that eldest is superlative of old; greatest in age or seniority while maiden is virgin.

As a noun maiden is

a girl or an unmarried young woman.

As adjectives the difference between eldest and primitive

is that eldest is superlative of old; greatest in age or seniority while primitive is of or pertaining to the beginning or origin, or to early times; original; primordial; primeval; first.

As a noun primitive is

an original or primary word; a word not derived from another, as opposed to {{term|derivative}}.