Conversion is a synonym of Transition. Transition is related to Melt. Melt is related to Heat. 
Assess is a synonym of Tax. Tax is related to Sales. Sales is related to Profit. 
Conversion <--Synonym--> Transition <--RelatedTo--> Melt <--RelatedTo--> Heat 
Assess <--Synonym--> Tax <--RelatedTo--> Sales <--RelatedTo--> Profit 