Words that start with 'y' and contain 'st'

In Scrabble, what's the highest number of points you can get using this list of words that start with 'y' and contain 'st'?
One could make 'yuckiest' which scores 17 points.

In total, how many words are possible to make using the combination of letters requested?
All in all, there are up to 59 words.

What is an example of a interesting word that starts with 'y' and includes 'st'?
Dictionarypedia considers 'yestermorn' to be the most strange word on this page. The dictionary defines it as "The morning of yesterday. Coleridge.".

Which word that starts with 'y' and includes 'st' is the most common word in the dictionary?
As far as well-known words go, there's 'yesterday', which ranks as the 2456^th most popular word.

Which word in particular from this list has the largest letter count?
Try 'yesterdayness', which contains 13 characters.