oxford vs saddle oxford

oxford and saddle oxford both are nouns.

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

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

Other hyponyms of oxford include saddle shoe.

oxford (noun)	saddle oxford (noun)
a low shoe laced over the instep	an oxford with a saddle of contrasting color