Baby is related to Step. 
Grocery is etymologically related to Gross. Gross is related to Profit. Profit is related to Incentive. Incentive is a synonym of Bonus. 
Baby <--RelatedTo--> Step 
Grocery --EtymologicallyRelatedTo--> Gross <--RelatedTo--> Profit <--RelatedTo--> Incentive <--Synonym--> Bonus 