Apparent is a synonym of Obvious. Obvious is related to Plain. Plain is related to Print. Print is related to Learning. 
Haul is a synonym of Cart. Cart is similar to Automobile. Automobile is related to Car. Roof is part of Car. 
Apparent <--Synonym--> Obvious <--RelatedTo--> Plain <--RelatedTo--> Print <--RelatedTo--> Learning 
Haul <--Synonym--> Cart <--SimilarTo--> Automobile <--RelatedTo--> Car <--PartOf-- Roof 