Foster is a synonym of Nerve. Nerve is related to Feel. Feel is related to Rough. Rough is a type of Sensation. 
Rib is related to Steak. Steak is related to Thick. 
Foster <--Synonym--> Nerve <--RelatedTo--> Feel <--RelatedTo--> Rough --IsA--> Sensation 
Rib <--RelatedTo--> Steak <--RelatedTo--> Thick 