Possible Clues:

• Pt. of speech
• As well as, e.g.: Abbr
• Or or nor: Abbr
• Nor, for one: abbr.
• And, e.g.: Abbr.
• Connecting wd.
• Nor, in a dict.
• Linking wd.
• If, and or but: Abbr.
• And, if, or but: Abbr.