Mark is related to Signature. Signature is a synonym of Characteristic. Characteristic is related to Personality. Identity is a type of Personality. 
Slope is a different concept from Steep. Steep is a type of Soak. Suck is etymologically related to Soak. Lip can be used for Suck. 
Mark <--RelatedTo--> Signature <--Synonym--> Characteristic <--RelatedTo--> Personality <--IsA-- Identity 
Slope <--DistinctFrom--> Steep --IsA--> Soak <--EtymologicallyRelatedTo-- Suck <--UsedFor-- Lip 