1) Avoirdupois 2) Bulk 3) Bulkiness 4) Check the weight of 5) Clout 6) Considerable size 7) Considerable weight 8) Determine weight by lifting 9) Encumbrance 10) Estimate weight 11) Exclusively Saxon word 12) Exclusively Anglo word 13) Great bulk 14) Great weight 15) Heave up 16) Heaviness 17) Heavy feel Found on https://www.crosswordclues.com/clue/heft
• (n.) Weight; ponderousness. • (n.) The greater part or bulk of anything; as, the heft of the crop was spoiled. • of Heft • (v. t.) To heave up; to raise aloft. • (n.) The act or effort of heaving/ violent strain or exertion. • (v. t.) To prove or try the weight of by raising. • (n.) Same as Haft, n. • (n...... Found on http://thinkexist.com/dictionary/meaning/heft/
Heft noun ; G. plural Hefte . [ G.] A number of sheets of paper fastened together, as for a notebook; also, a part of a serial publication. « The size of ' hefts ' will depend on the material requiring attention, and the annual volume is to cost about 15 marks.» Found on http://www.encyclo.co.uk/webster/H/27