hip vs os pubis

hip and os pubis both are nouns.

Word	Noun	Adjective	Verb	Adverb
hip	Yes	Yes	No	No
os pubis	Yes	No	No	No

hip (noun)	os pubis (noun)
either side of the body below the waist and above the thigh	one of the three sections of the hipbone; together these two bones form the front of the pelvis
the structure of the vertebrate skeleton supporting the lower limbs in humans and the hind limbs or corresponding parts in other vertebrates
the ball-and-socket joint between the head of the femur and the acetabulum
the fruit of a rose plant
(architecture) the exterior angle formed by the junction of a sloping side and a sloping end of a roof

hip (adjective)	os pubis (adjective)
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