Ceiling can Metaphor. Ceiling is related to Ground. Ground is related to Plant. 
Capacity is related to Amount. Amount is related to Full. Full is a synonym of Total. 
Metaphor <--CapableOf-- Ceiling <--RelatedTo--> Ground <--RelatedTo--> Plant 
Capacity <--RelatedTo--> Amount <--RelatedTo--> Full <--Synonym--> Total 