oscitancy vs obtuseness

oscitancy and obtuseness both are nouns.

Word	Noun	Adjective	Verb	Adverb
oscitancy	Yes	No	No	No
obtuseness	Yes	No	No	No

As nouns, obtuseness is a hypernym of oscitancy; that is, obtuseness is a word with a broader meaning than oscitancy:

Other hypernyms of oscitancy include dullness, drowsiness, sleepiness, somnolence.

oscitancy (noun)	obtuseness (noun)
an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom	the quality of lacking a sharp edge or point
drowsiness and dullness manifested by yawning	the quality of being slow to understand