Pliny vs Pliny the Younger

Pliny and Pliny the Younger both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pliny	Yes	No	No	No
Pliny the Younger	Yes	No	No	No

As nouns, Pliny and Pliny the Younger are synonyms defined as:

Pliny and Pliny the Younger: Roman writer and nephew of Pliny the Elder; author of books of letters that commented on affairs of the day (62-113)

Other synonyms of Pliny include Gaius Plinius Caecilius Secundus.

Pliny (noun)	Pliny the Younger (noun)
Roman author of an encyclopedic natural history; died while observing the eruption of Vesuvius (23-79)	Roman writer and nephew of Pliny the Elder; author of books of letters that commented on affairs of the day (62-113)
Roman writer and nephew of Pliny the Elder; author of books of letters that commented on affairs of the day (62-113)