Projection is related to Sound. Voice is a type of Sound. Voice is related to Way. Way is related to Side. 
Grasp is a synonym of Understanding. Friend can be used for Understanding. Friend is related to Peer. Peer is related to Equivalent. 
Projection <--RelatedTo--> Sound <--IsA-- Voice <--RelatedTo--> Way <--RelatedTo--> Side 
Grasp <--Synonym--> Understanding <--UsedFor-- Friend <--RelatedTo--> Peer <--RelatedTo--> Equivalent 