Rhythm is a synonym of Cycle. Cycle is a synonym of Pattern. Pattern is a synonym of Mirror. 
Design is the opposite of Random. Random is a synonym of Average. Average is related to Math. Math is related to Effect. 
Rhythm <--Synonym--> Cycle <--Synonym--> Pattern <--Synonym--> Mirror 
Design <--Antonym--> Random <--Synonym--> Average <--RelatedTo--> Math <--RelatedTo--> Effect 