Words with 'i' as the first letter that end with 'f'

What is the longest word you can assemble using the combination of letters specified?
The longest word that's possible to assemble from this list is 'intrigueproof', and it is made up of 13 characters.

What's the highest scoring word you can play in Scrabble ?
You could make 'infeoff' for a total score of 16 points.

What is an interesting word that starts with 'i' and ends with 'f'?
Our team considers 'ingulf' to be the most peculiar word. According to the Oxford dictionary, 'ingulf' is defined as "To swallow up or overwhelm in, or as in, a gulf; to cast into a gulf. See Engulf. A river large . . . Passed underneath ingulfed. Milton.".

How many words are available using this combination of letters?
There are up to 23 entries.

Which word that starts with 'i' and ends with 'f' is the most common word?
We've identified that 'if' is the 54^th most common word.