Yes, ire is a Scrabble word!
...and is worth 3 points in Scrabble, and 3 points in Words with Friends
ire
Noun
1. A strong emotion; a feeling that is oriented toward some real or supposed grievance
2. Belligerence aroused by a real or supposed wrong (personified as one of the deadly sins)
What Scrabble words can I make with the letters in ire?
3 Letter Words
2 Letter Words