Prayer is related to Silent. Silent is related to Smile. Smile is related to Pleasant. 
Cruise is related to Missile. Missile is related to Bomb. you are likely to find Bomb in/at/on Aircraft. 
Prayer <--RelatedTo--> Silent <--RelatedTo--> Smile <--RelatedTo--> Pleasant 
Cruise <--RelatedTo--> Missile <--RelatedTo--> Bomb --AtLocation--> Aircraft 