1. In an observant manner
   - observantly

See also: observing

• 1st Baron Beaverbrook
• 1st Baron Verulam
• 1st class
• 1st Earl Attlee
• 1st Earl Baldwin of Bewdley
• 1st Earl of Balfour
• 1st lieutenant
• 1st Viscount Montgomery of Alamein
• 1st-class mail
• 2
• 2 Chronicles
• 2 Esdras
• 2 Kings
• 2 Maccabees
• 2 Samuel
• 2-dimensional
• 2-hitter
• 2-hydroxybenzoic acid
• 2-methylpropenoic acid
• 20
• 20-20 vision
• 20/20
• 200
• 200th
• 20th