What It Scores
SITUP is a valid word in the tournament list this site uses. Tile values only, before any premium square: 7 in Scrabble and 9 in Words With Friends. The letters break down as S1 I1 T1 U1 P3.
Words Made From The Letters In SITUP
36 shorter words come out of these tiles. On a board that matters more than the long play, because a short word on a premium square often beats a long one on plain squares.
4 letter words (9)
3 letter words (18)
2 letter words (9)
Longer Words Containing SITUP
SITUP appears inside each of these, which is what makes it worth knowing as a hook.
Next: the Word Unscrambler for any letters at all. Full entry and definition at Merriam-Webster.