Voice is related to Echo. Echo is a type of Resemble. Resemble is a synonym of Remind. 
Towel is a type of Wipe. Wipe is related to Wash. Wash is related to Wet. Wet is related to Swim. 
Voice <--RelatedTo--> Echo --IsA--> Resemble <--Synonym--> Remind 
Towel --IsA--> Wipe <--RelatedTo--> Wash <--RelatedTo--> Wet <--RelatedTo--> Swim 