Yes, suds is a Scrabble word!
...and is worth 5 points in Scrabble, and 6 points in Words with Friends
suds
Verb
1. Wash in suds
2. Make froth or foam and become bubbly
Noun
1. The froth produced by soaps or detergents
2. A dysphemism for beer (especially for lager that effervesces)
What Scrabble words can I make with the letters in suds?
2 Letter Words