Operate is a synonym of Run. Run is related to Pace. 
Ocean is related to Fog. Fog is a synonym of Cloud. Cloud is related to Ball. Ball is related to Circle. 
Operate <--Synonym--> Run <--RelatedTo--> Pace 
Ocean <--RelatedTo--> Fog <--Synonym--> Cloud <--RelatedTo--> Ball <--RelatedTo--> Circle 