Root س ر ب(s r b) has 4 unique word forms and appears 4 times in the Quran.

English gloss Flow, Flock, Swarm, Mirage

Word Translation Occurrences
سَرَابًا a mirage, a mirage 2
سَرَبٗا slipping away, slipping away 2
كَسَرَابِۭ (are) like a mirage, (are) like a mirage 2
وَسَارِبُۢ or goes freely, or goes freely 2