Sun can be used for See. See is related to Glimpse. Glimpse is a synonym of Perceive. Perceive is etymologically related to Conceive. 
City is related to Colony. Colony is related to Farm. Farm is related to Type. Type is related to Porch. 
Sun --UsedFor--> See <--RelatedTo--> Glimpse <--Synonym--> Perceive --EtymologicallyRelatedTo--> Conceive 
City <--RelatedTo--> Colony <--RelatedTo--> Farm <--RelatedTo--> Type <--RelatedTo--> Porch 