Spell is a synonym of Relieve. Relieve is a synonym of Aid. Aid is the opposite of Support. Support is a synonym of Defend. 
Ideal is related to Fit. Fit is related to Perfect. Perfect is a synonym of Pure. Pure is related to Clean. 
Spell <--Synonym--> Relieve <--Synonym--> Aid <--Antonym--> Support <--Synonym--> Defend 
Ideal <--RelatedTo--> Fit <--RelatedTo--> Perfect <--Synonym--> Pure <--RelatedTo--> Clean 