Byrd vs Admiral Byrd

Byrd and Admiral Byrd both are nouns.

Word	Noun	Adjective	Verb	Adverb
Byrd	Yes	No	No	No
Admiral Byrd	Yes	No	No	No

As nouns, Byrd and Admiral Byrd are synonyms defined as:

Byrd and Admiral Byrd: explorer and United States naval officer; led expeditions to explore Antarctica (1888-1957)

Other synonyms of Byrd include Richard E. Byrd, Richard Evelyn Byrd.

Byrd (noun)	Admiral Byrd (noun)
explorer and United States naval officer; led expeditions to explore Antarctica (1888-1957)	explorer and United States naval officer; led expeditions to explore Antarctica (1888-1957)
English organist and composer of church music; master of 16th century polyphony; was granted a monopoly in music printing with Thomas Tallis (1543-1623)