Kelvin vs First Baron Kelvin

Kelvin and First Baron Kelvin both are nouns.

Word	Noun	Adjective	Verb	Adverb
Kelvin	Yes	No	No	No
First Baron Kelvin	Yes	No	No	No

As nouns, Kelvin and First Baron Kelvin are synonyms defined as:

Kelvin and First Baron Kelvin: British physicist who invented the Kelvin scale of temperature and pioneered undersea telegraphy (1824-1907)

Other synonyms of Kelvin include William Thompson.

Kelvin (noun)	First Baron Kelvin (noun)
British physicist who invented the Kelvin scale of temperature and pioneered undersea telegraphy (1824-1907)	British physicist who invented the Kelvin scale of temperature and pioneered undersea telegraphy (1824-1907)