Moment is related to Unit. Unit is related to Month. Month is related to Birthday. Birthday is the opposite of Anniversary. 
Paint is related to Chemical. Chemical is a different concept from Physical. Physical is related to Hurt. 
Moment <--RelatedTo--> Unit <--RelatedTo--> Month <--RelatedTo--> Birthday <--Antonym--> Anniversary 
Paint <--RelatedTo--> Chemical <--DistinctFrom--> Physical <--RelatedTo--> Hurt 