Yes, rash is a Scrabble word!
...and is worth 7 points in Scrabble, and 6 points in Words with Friends
rash
Adjective
1. Imprudently incurring risk
2. Marked by defiant disregard for danger or consequences
Noun
1. Any red eruption of the skin
2. A series of unexpected and unpleasant occurrences
What Scrabble words can I make with the letters in rash?
3 Letter Words
2 Letter Words