1. In an observant manner
   - observantly

See also: observing

• Interstate Commerce Commission
• interstate highway
• interstellar
• interstellar medium
• interstellar space
• interstice
• interstitial
• interstitial cell-stimulating hormone
• interstitial fluid
• interstitial plasma cell pneumonia
• interstitial pneumonia
• interstitial tissue
• interstratify
• intertextuality
• intertidal
• intertribal
• intertrigo
• intertropical
• intertwine
• intertwist
• interurban
• interval
• intervale
• intervene
• intervener