Conclusion is the opposite of Start. Start is the opposite of Finish. Finish is related to Sum. Sum is a synonym of Union. 
Butter is related to Produce. Produce is related to Fresh. 
Conclusion <--Antonym--> Start <--Antonym--> Finish <--RelatedTo--> Sum <--Synonym--> Union 
Butter <--RelatedTo--> Produce <--RelatedTo--> Fresh 