1) Allocation word 2) Allotment word 3) By the item 4) By the unit 5) Distributive word 6) Division word 7) Divvying word 8) Divvying-up word 9) Dorset slang for for each 10) Each 11) Equal-share word 12) Equality word 13) For each 14) For each one 15) For each person 16) For each thing 17) For every one Found on https://www.crosswordclues.com/clue/apiece
A·piece' adverb [ Prefix a- + piece .] Each by itself; by the single one; to each; as the share of each; as, these melons cost a shilling apiece . 'Fined . . . a thousand pounds apiece .' Hume. Found on http://www.encyclo.co.uk/webster/A/102