ROGET THESAURUS
sublation
Subtraction
N
nonaddition, subtraction, subtraction, subduction, deduction, retrenchment, removal, withdrawal, ablation,
sublation, abstraction, garbling mutilation, detruncation, amputation, abscission, excision, recision, curtailment, minuend, subtrahend, decrease, abrasion, subtracted, subtractive, in deduction, less, short of, minus, without, except, except for, excepting, with the exception of, barring, save, exclusive of, save and except, with a reservation, not counting, if one doesn't count.