Rocket is related to Space. Space is related to Darkness. Darkness is related to Black. 
Spell is a type of Speech. Speech is related to Dialogue. Dialogue is a synonym of Negotiation. 
Rocket <--RelatedTo--> Space <--RelatedTo--> Darkness <--RelatedTo--> Black 
Spell --IsA--> Speech <--RelatedTo--> Dialogue <--Synonym--> Negotiation 