Line is a synonym of Contrast. Oppose is a type of Contrast. Oppose is the opposite of Promote. 
Harvest is related to Garden. Garden is related to Small. Small is related to Cord. Cord is part of Telephone. 
Line <--Synonym--> Contrast <--IsA-- Oppose <--Antonym--> Promote 
Harvest <--RelatedTo--> Garden <--RelatedTo--> Small <--RelatedTo--> Cord --PartOf--> Telephone 