Synonyms of expendable

2 Syllables
deadwood, excess, scrapper
3 Syllables
causeless, unneeded, superfluent, usable, superfluous, useless
4 Syllables
inutile, replaceable, dispensable, residuary, unrequired, unimportant, inessential, nonessential, unusable, unessential, consumable, nonfunctional, unfunctional, unusuable, disposable
5 Syllables
unnecessary, utilizable
7 Syllables
supererogatory