Equation is a synonym of Equality. Equality is related to Being. Being is related to Certain. Certain is similar to Reliable. 
Comparable is related to Equal. Equal is a synonym of Peer. 
Equation <--Synonym--> Equality <--RelatedTo--> Being <--RelatedTo--> Certain <--SimilarTo--> Reliable 
Comparable <--RelatedTo--> Equal <--Synonym--> Peer 