restlessness vs nervousness

restlessness and nervousness both are nouns.

Word	Noun	Adjective	Verb	Adverb
restlessness	Yes	No	No	No
nervousness	Yes	No	No	No

As nouns, nervousness is a hypernym of restlessness; that is, nervousness is a word with a broader meaning than restlessness:

restlessness (noun)	nervousness (noun)
inability to rest or relax or be still	a sensitive or highly strung temperament
the quality of being ceaselessly moving or active	the anxious feeling you have when you have the jitters
a feeling of agitation expressed in continual motion	an uneasy psychological state
a lack of patience; irritation with anything that causes delay