How many actual words could one make using the specified combination?There are up to 387 entries.
Which word that starts with 'pen' and includes 'a' is the most interesting?Certainly one of the most unusual words from this list is 'pentangle'. It means "A pentagon. [R.] Sir T. Browne.".
What's the most common word on this page?The most common word is 'pendant', which is actually the 4345th most popular word in this list.
Which word on this page has the largest character count?Try 'pentamethylenediamine'
What's the highest number of points you can get in Scrabble using this list of words that start with 'pen' and contain 'a'?With a considerable 387 entries, your best choice is to choose 'penalize' scoring 19 points.