Regain is a synonym of Find. Find is related to Reveal. Reveal is a synonym of Open. Open is related to Gate. 
Hot is a synonym of Temperature. Temperature is related to Number. 
Regain <--Synonym--> Find <--RelatedTo--> Reveal <--Synonym--> Open <--RelatedTo--> Gate 
Hot <--Synonym--> Temperature <--RelatedTo--> Number 