adrenocorticotrophin/əˌdreenohˌkawtikohʹtrohfin/ noun

• iffy
• if memory serves
• 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