THESAURUS
amputation
abscission, anastomotic operation, annihilation, bloodless operation, butchering, capital operation, chopping, cleavage, compensating operation, corneal transplant, crescent operation, cutting, destruction, dichotomy, elective operation, elimination, emergency operation, enucleation, eradication, excision, exclusion, exploratory operation, extinction, extirpation, fenestration operation, fission, heart transplant, interval operation, kidney transplant, laceration, major operation, minor operation, mutilation, operation, organ transplant, organ transplantation, palliative operation, radical operation, removal, rending, rescission, resection, ripping, scission, section, severance, slashing, slicing, splitting, surgery, surgical intervention, surgical operation, surgical technique, tearing, the knife, transplant
ROGET THESAURUS
amputation
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.