Speak is a type of Sound. Speak is a synonym of Articulate. 
Lip is related to Stiff. Stiff is the opposite of Pay. Pay is related to Agreement. Agreement is a type of Harmony. 
Sound <--IsA-- Speak <--Synonym--> Articulate 
Lip <--RelatedTo--> Stiff <--Antonym--> Pay <--RelatedTo--> Agreement --IsA--> Harmony 