Bounce is a synonym of Spring. Spring is related to Son. 
Trend is a synonym of Drift. Drift is etymologically related to Drive. Drive is related to Auto. Automatic is derived from Auto. 
Bounce <--Synonym--> Spring <--RelatedTo--> Son 
Trend <--Synonym--> Drift --EtymologicallyRelatedTo--> Drive <--RelatedTo--> Auto <--DerivedFrom-- Automatic 