Synonyms for Chunking:

n.

chunking (noun)
unitization.
cognition (noun)
unitization.

v.

portioning (verb)
splitting, compartmentalizing, Halving, sharing, Subdividing, Dismembering, Allotting, budgeting, partitioning, slicing, apportioning, dividing, zoning, measuring, Portioning, parceling, Allowing, segmenting, cutting, Piecing.

Other synonyms:

Other relevant words:
unitization.