Serve is a synonym of Function. Function is related to Cut. Cut is related to Slide. Slide is related to Ladder. 
Working is related to Factory. Factory is related to Producer. Producer is a synonym of Manufacturer. 
Serve <--Synonym--> Function <--RelatedTo--> Cut <--RelatedTo--> Slide <--RelatedTo--> Ladder 
Working <--RelatedTo--> Factory <--RelatedTo--> Producer <--Synonym--> Manufacturer 