Touch is related to Taste. Taste is related to Purpose. Purpose is a synonym of Mean. Mean is a synonym of Fierce. 
Cliff is related to Rock. Rock is related to Salt. Salt is related to Sodium. 
Touch <--RelatedTo--> Taste <--RelatedTo--> Purpose <--Synonym--> Mean <--Synonym--> Fierce 
Cliff <--RelatedTo--> Rock <--RelatedTo--> Salt <--RelatedTo--> Sodium 