[adj] furnishing support or assistance; "a supportive family network"; "his family was supportive of his attempts to be a writer"
accessory, adjunct, adjuvant, ancillary, appurtenant, auxiliary, certificatory, collateral, confirmative, confirmatory, confirming, corroborative, corroboratory, demonstrative of(p), encouraging, subsidiary, substantiating, substantiative, supporting, val
unsupportive