obtuseness vs oscitance

obtuseness and oscitance both are nouns.

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

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

Other hyponyms of obtuseness include oscitancy.

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