sick building syndrome 
noun [mass noun]
A condition affecting office workers, typically marked by headaches and respiratory problems, attributed to unhealthy or stressful factors in the working environment such as poor ventilation.Lost U.S. worker productivity associated with related conditions such as sick building syndrome has been estimated at $10 billion/year....
- The diagnosis of mass psychogenic illness shares many characteristics with sick building syndrome and other such illnesses, further obscuring the issue for physicians.
- If you feel you might have sick building syndrome or a building-related illness, you can ask your family physician for a referral to one of the five occupational health clinics in Montreal.
- nothingness
- nothing of the kind
- nothing of the sort
- nothing (or nothing else) for it
- nothing succeeds like success
- nothing ventured, nothing gained
- nothingy
- Nothofagus
- nothomorph
- no-thoroughfare
- nothosaur
- no-thought
- no through road
- no-throw
- not-I
- notice
- noticeability
- noticeable
- noticeably
- noticeboard
- notice paper
- noticer
- notifiable
- notification
- notifier