Orpington vs Gallus gallus

Orpington and Gallus gallus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Orpington	Yes	No	No	No
Gallus gallus	Yes	No	No	No

As nouns, Gallus gallus is a hypernym of Orpington; that is, Gallus gallus is a word with a broader meaning than Orpington:

Orpington: English breed of large chickens with white skin
Gallus gallus: a domestic fowl bred for flesh or eggs; believed to have been developed from the red jungle fowl

Other hypernyms of Orpington include chicken.

Orpington (noun)	Gallus gallus (noun)
English breed of large chickens with white skin	a jungle fowl of southeastern Asia that is considered ancestral to the domestic fowl
	a domestic fowl bred for flesh or eggs; believed to have been developed from the red jungle fowl