Words that start with 'i' and contain 'se'

Which word that starts with 'i' and includes 'se' is the most popular word?
The most well-known word in the dictionary according to our system is 'itself', which is in fact the 449^th most common word in the dictionary.

What's an interesting word on this list of words that start with 'i' and include 'se'?
A good example of a weird word from this list goes to 'insecureness'. The general definition of 'insecureness' is as follows: "Insecurity.". Source Oxford Dictionary.

What's the longest word you can create with this list?
The word 'irrepresentableness' is made up of 19 characters.

What's the highest scoring word you can play in Scrabble ?
As there are so many words to select from, we'd suggest opting for 'intersex' which scores 15 points.

In total, how many words are available using this list?
You can choose from up to a maximum of 536 entries on our list of words that start with 'i' and include 'se'.