Internet is related to Pain. Pain is related to Severe. Severe is a synonym of Hard. Hard is related to Rough. 
Unity is related to Number. Number is related to Odd. Odd is a synonym of Strange. 
Internet <--RelatedTo--> Pain <--RelatedTo--> Severe <--Synonym--> Hard <--RelatedTo--> Rough 
Unity <--RelatedTo--> Number <--RelatedTo--> Odd <--Synonym--> Strange 