Verbal is the opposite of Written. Written is related to Message. Promotion is a type of Message. 
Character is related to Sign. Sign is related to Nod. Nod is related to Gesture. 
Verbal <--Antonym--> Written <--RelatedTo--> Message <--IsA-- Promotion 
Character <--RelatedTo--> Sign <--RelatedTo--> Nod <--RelatedTo--> Gesture 