junkie or junky/ʹjungki/ noun (pl -ies) (pl junkies)

• if need be
• if not
• if one's face fits
• -iform
• IFS
• if the worst comes to the worst
• -ify
• if you please
• if you've got it, flaunt it
• Igbo
• igloo
• igneous
• ignis fatuus
• ignite
• ignition
• ignitron
• ignoble
• ignominious
• ignominy
• ignoramus
• ignorant
• ignore
• iguana
• iguanodon
• IHS