Is there an example word from this page which could be considered as unique in any regard?By far the most interesting word in this list is 'ineffability'. 'Ineffability' is defined as "The quality or state of being ineffable; ineffableness; unspeakableness.", according to the dictionary.
Which word that starts with 'ine' and includes 'i' is the most popular word in the dictionary?A popular word for your request is 'inevitable'.
How many characters are in the largest word from this page?The word 'inextinguishability' is made up of 19 characters.
What's the max number of words one can construct using this combination of letters?It is possible to make 214 words using the specified letter combination.
What's the highest scoring word in Scrabble using the above combination ?With an overwhelming 214 entries, your best bet is 'inequity' scoring 20 points in total.