1. As a matter of instinct
   "he instinctively grabbed the knife"
   - instinctually, responsively

See also: instinctive

• sulphanilamide
• sulphanilic acid
• sulphate
• sulphide
• sulphite
• sulphonamide
• sulphone
• sulphonic acid
• sulphur
• sulphur bacteria
• sulphur bottom
• sulphur butterfly
• sulphur dioxide
• sulphur hexafluoride
• sulphur mine
• sulphur mustard
• sulphur oxide
• sulphur paintbrush
• sulphur-crested cockatoo
• sulphur-yellow
• sulphureous
• sulphurette
• sulphuretted
• sulphuric
• sulphuric acid