Nouns

(n)scabies, itcha contagious skin infection caused by the itch mite; characterized by persistent itching and skin irritation“he has a bad case of the itch”
(n)urge, itcha strong restless desire“why this urge to travel?”
(n)itch, itchiness, itchingan irritating cutaneous sensation that produces a desire to scratch

Verbs

(v)rub, scratch, itchscrape or rub as if to relieve itching“Don't scratch your insect bites!”
(v)itchhave or perceive an itch“I'm itching — the air is so dry!”
(v)itchcause to perceive an itch“his skin itched”
(v)itch, spoilhave a strong desire or urge to do something“She is itching to start the project”, “He is spoiling for a fight”