non-response non-response bias non-response rate non-responses non-responsive non-restricted firearms non-restrictive non-restrictive example non-retroactivity non-return non-return valve non-return valves non-returnable non-revenue water non-reversible non-rigid non-road non-road mobile non-road mobile machinery non-roma non-roman non-rotatable non-rotating non-routine non-royal non-salary non-sampling errors non-saudi non-scheduled non-schengen non-school non-scientific non-seasonal non-sectarian non-security non-selective non-self-governing non-self-governing territories non-self-governing territory non-sensitive non-sequential non-sequitur non-sexist non-si non-signatory non-silicone non-simultaneous non-singular non-skid non-slip non-slip footwear non-slip rubber non-slip surface non-small non-small cell non-small cell lung non-small cell lung cancer non-small-cell lung non-smoker non-smokers non-smoking non-smoking apartments non-smoking area non-smoking hotel non-smoking room non-smoking rooms non-soap non-solicitation non-solid non-soluble non-solvent non-sovereign non-spanish non-sparking non-spatial non-speaking non-specialised non-specialists non-specific non-specific binding non-specific immune non-specific symptoms non-specifically bound non-specified non-spherical non-sporting non-staff non-staff costs non-standard non-standard employment non-standard forms non-standard work non-standardized non-starter non-state non-state actor non-state actors non-state armed non-state armed groups