Limitation is a synonym of Restriction. Restriction is a synonym of Limit. Limit is related to Speed. Speed is related to Horse. 
Ocean is related to Massive. Massive is the opposite of Light. Light is related to Smoke. 
Limitation <--Synonym--> Restriction <--Synonym--> Limit <--RelatedTo--> Speed <--RelatedTo--> Horse 
Ocean <--RelatedTo--> Massive <--Antonym--> Light <--RelatedTo--> Smoke 