Strong's #7338: rachab (pronounced rakh'-ab)
from 7337; a width:--breadth, broad place.
Brown-Driver-Briggs Hebrew Lexicon:
rachab
1) breadth, broad or wide expanse
Part of Speech: noun masculine
Relation: from H7337
Usage:
This word is used 2 times:
Job 36:16: "Even so would he have removed thee out of the strait into a broad place, where there is no"
Job 38:18: "Hast thou perceived the breadth of the earth? declare if thou knowest it all."