Canvas is related to Picture. Picture is related to Portrait. 
Afternoon is the opposite of Morning. Morning is related to Wake. Wake is related to Bed. Bed is related to Tuck. 
Canvas <--RelatedTo--> Picture <--RelatedTo--> Portrait 
Afternoon <--Antonym--> Morning <--RelatedTo--> Wake <--RelatedTo--> Bed <--RelatedTo--> Tuck 