Words that start with 'sin' and contain 't'

In total, how many words are available using these specific combinations of letters?
All in all, one can assemble 112 words.

Is there a word from this page which could be considered as unique in any respect?
Dictionarypedia feel 'sinter' to be the most strange word. The definition of 'sinter' is as follows: "Dross, as of iron; the scale which files from iron when hammered; -- applied as a name to various minerals. Calcareous sinter, a loose banded variety of calcite formed by deposition from lime-bearing waters; calcareous tufa; travertine. -- Ceraunian sinter, fulgurite. -- Siliceous sinter, a light cellular or fibrous opal;...". Source Cambridge Dictionary.

What is the most popular word that starts with 'sin' and includes 't' in the dictionary?
The most common word is 'sincerity', which is actually the 6776^th most common word in this list.

What's the highest scoring word you can play in Scrabble ?
With an overwhelming 112 entries, you should select 'sinkboat' scoring 14 points.

How many letters are in the longest word on this list?
The biggest word that's possible to construct from the combination specified is 'singleheartedness', which is made up of 17 characters.