hackle vs saddle hackle

hackle and saddle hackle both are nouns.

Word	Noun	Adjective	Verb	Adverb
hackle	Yes	No	Yes	No
saddle hackle	Yes	No	No	No

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

hackle: long slender feather on the necks of e.g. turkeys and pheasants
saddle hackle: a long narrow feather on the back (saddle) of a domestic fowl

Other hyponyms of hackle include saddle feather.

hackle (noun)	saddle hackle (noun)
long slender feather on the necks of e.g. turkeys and pheasants	a long narrow feather on the back (saddle) of a domestic fowl

hackle (verb)	saddle hackle (verb)
comb with a heckle