Suite is etymologically related to Suit. Suite is related to Case. Case is related to Letter. 
Decline is a synonym of Pine. Pine is related to Seed. Seed is related to Part. 
Suit <--EtymologicallyRelatedTo-- Suite <--RelatedTo--> Case <--RelatedTo--> Letter 
Decline <--Synonym--> Pine <--RelatedTo--> Seed <--RelatedTo--> Part 