Synonyms of supporting

2 Syllables
helping, shielding, substract, aiding, second, placer, grass-roots, grassroots, under
3 Syllables
approving, motherly, adjuvant, promoting, re-serve, runner-up, seconding
4 Syllables
auxiliaries, confirmation, encouraging, collaterals, confirmations, adjunctive, collateral, validations, supportive, fundamental, validation, secondary, auxiliary, substrative, supplemental, caretaking
5 Syllables
confirmatory, confirmative, affirmatory, affirmative, axiological, encouragement
6 Syllables
corroborative