Helpful is related to Encouraging. Encouraging is a synonym of Favorable. Favorable is the opposite of Bad. Bad is related to Danger. 
Register is a synonym of Style. Style is related to Print. Print is a synonym of Publish. 
Helpful <--RelatedTo--> Encouraging <--Synonym--> Favorable <--Antonym--> Bad <--RelatedTo--> Danger 
Register <--Synonym--> Style <--RelatedTo--> Print <--Synonym--> Publish 