Bessemer converter vs converter

Bessemer converter and converter both are nouns.

Word	Noun	Adjective	Verb	Adverb
Bessemer converter	Yes	No	No	No
converter	Yes	No	No	No

As nouns, converter is a hypernym of Bessemer converter; that is, converter is a word with a broader meaning than Bessemer converter:

Bessemer converter: a refractory-lined furnace used to convert pig iron into steel by the Bessemer process
converter: a device for changing one substance or form or state into another

Other hypernyms of Bessemer converter include convertor.

Bessemer converter (noun)	converter (noun)
a refractory-lined furnace used to convert pig iron into steel by the Bessemer process	a device for changing one substance or form or state into another