Noun

• S: (n) neutral (one who does not side with any party in a war or dispute)
• direct hyponym / full hyponym
• S: (n) fence-sitter (a person who won't take sides in a controversy)
• S: (n) stakeholder (someone entrusted to hold the stakes for two or more persons betting against one another; must deliver the stakes to the winner)
• direct hypernym / inherited hypernym / sister term
• derivationally related form

Adjective

• S: (adj) impersonal, neutral (having no personal preference) "impersonal criticism"; "a neutral observer"
• similar to
• S: (adj) objective, nonsubjective (undistorted by emotion or personal bias; based on observable phenomena) "an objective appraisal"; "objective evidence"
• derivationally related form
• antonym
• S: (adj) inert, indifferent, neutral (having only a limited ability to react chemically; chemically inactive) "inert matter"; "an indifferent chemical in a reaction"
• S: (adj) neutral (not supporting or favoring either side in a war, dispute, or contest)
• S: (adj) neutral (possessing no distinctive quality or characteristics)
• similar to
• antonym
• S: (adj) achromatic, neutral (having no hue) "neutral colors like black or white"
• S: (adj) neutral (lacking distinguishing quality or characteristics) "a neutral personality that made no impression whatever"
• similar to
• antonym
• S: (adj) neutral, electroneutral (having no net electric charge)