Answer:

abbs

Answer	Crossword Clue
ABBS	Yarns for warps.
ABBS	Warp yarns.
ABBS	Yarns for the warp.

ABBS	Coarse wools
ABBS	Warp yarns

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.