Space is related to Field. Field is a synonym of Sphere. Sphere is a synonym of Sector. 
Negotiate is related to Offer. Offer is related to Potential. Potential is the opposite of Disability. Disability is the opposite of Ability. 
Space <--RelatedTo--> Field <--Synonym--> Sphere <--Synonym--> Sector 
Negotiate <--RelatedTo--> Offer <--RelatedTo--> Potential <--Antonym--> Disability <--Antonym--> Ability 