restlessness vs fidgetiness

restlessness and fidgetiness both are nouns.

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

As nouns, restlessness and fidgetiness are synonyms defined as:

restlessness and fidgetiness: a feeling of agitation expressed in continual motion

Other synonyms of restlessness include fidget.

restlessness (noun)	fidgetiness (noun)
inability to rest or relax or be still	a feeling of agitation expressed in continual motion
the quality of being ceaselessly moving or active
a feeling of agitation expressed in continual motion
a lack of patience; irritation with anything that causes delay