Ambitious is etymologically related to Ambition. Ambition is a synonym of Dream. Dream is related to Wild. Wild is a synonym of Fantastic. 
Monster is related to Giant. Giant is a synonym of Huge. 
Ambitious --EtymologicallyRelatedTo--> Ambition <--Synonym--> Dream <--RelatedTo--> Wild <--Synonym--> Fantastic 
Monster <--RelatedTo--> Giant <--Synonym--> Huge 