Adapted to sustain, strengthen, or corroborate.(adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "sustentative" in a sentence
"There ` s no reason for somebody who has something sustentative to talk about to go talk to Hannity or go talk to Bill O ` Reilly or FOX and friends or really any of they ` re a very obvious propaganda --"
"There is no sustentative polling data at the time of this writing that suggests otherwise."
"Am I the only one who finds the bloggers writing more sustentative “articles” than the NYT journalists over the last 2 or 3 days?"