Strong's #4875: mshow'ah (pronounced meh-o-aw')
 or mshoah {mesh-o-aw'}; from the same as 7722; (a) ruin, abstractly (the act) or concretely (the wreck):--desolation, waste.
Brown-Driver-Briggs Hebrew Lexicon:
 ׁ / ׁ 
  meshô'âh 
 
 1) desolation, ruin
 
  Part of Speech: noun feminine
Relation: from the same as H7722
Usage:
This word is used 3 times:
Job 30:3: "into the wilderness in former time desolate  and waste."
Job 38:27: "To satisfy the desolate  and waste ground; and to cause the bud of the tender herb to spring forth?"
Zephaniah 1:15: "and distress, a day of wasteness  and desolation, a day of darkness and gloominess, a day"