chicken vs Orpington

chicken and Orpington both are nouns.

Word	Noun	Adjective	Verb	Adverb
chicken	Yes	Yes	No	No
Orpington	Yes	No	No	No

As nouns, Orpington is a hyponym of chicken; that is, Orpington is a word with a more specific, narrower meaning than chicken:

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

Other hyponyms of chicken include biddy, chick, cock, rooster, capon, biddy, hen, spring chicken, Rhode Island red, Dominick, Dominique.

chicken (noun)	Orpington (noun)
a domestic fowl bred for flesh or eggs; believed to have been developed from the red jungle fowl	English breed of large chickens with white skin
a foolhardy competition; a dangerous activity that is continued until one competitor becomes afraid and stops
the flesh of a chicken used for food
a person who lacks confidence, is irresolute and wishy-washy

chicken (adjective)	Orpington (adjective)
easily frightened