Incentive is related to Profit. Profit is related to Earn. 
Stomach is related to Contain. Contain is a synonym of Comprise. Comprise is a synonym of Incorporate. Incorporate is a synonym of Integrate. 
Incentive <--RelatedTo--> Profit <--RelatedTo--> Earn 
Stomach <--RelatedTo--> Contain <--Synonym--> Comprise <--Synonym--> Incorporate <--Synonym--> Integrate 