sustainer
sus·tai·ner
noun
1.
someone who upholds or maintains
- “firm upholders of tradition”
- “they are sustainers of the idea of democracy”
Origin
From sustain + -er.
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.