hipbone vs innominate bone

hipbone and innominate bone both are nouns.

Word	Noun	Adjective	Verb	Adverb
hipbone	Yes	No	No	No
innominate bone	Yes	No	No	No

As nouns, hipbone and innominate bone are synonyms defined as:

hipbone and innominate bone: large flaring bone forming one half of the pelvis; made up of the ilium and ischium and pubis

hipbone (noun)	innominate bone (noun)
large flaring bone forming one half of the pelvis; made up of the ilium and ischium and pubis	large flaring bone forming one half of the pelvis; made up of the ilium and ischium and pubis