fidget vs restlessness

fidget and restlessness both are nouns.

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

As nouns, fidget and restlessness are synonyms defined as:

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

Other synonyms of fidget include fidgetiness.

fidget (noun)	restlessness (noun)
a feeling of agitation expressed in continual motion	inability to rest or relax or be still
	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

fidget (verb)	restlessness (verb)
move restlessly