Backer and Sustainer

Backer noun - A person who actively supports or favors a cause.

Sustainer and backer are semantically related In some cases you can use "Sustainer" instead a noun "Backer".

Nearby Words: backing, backed

Sustainer noun - Someone who upholds or maintains.

Backer and sustainer are semantically related in sponsor topic. You can use "Backer" instead a noun "Sustainer", if it concerns topics such as promotes, person who helps another.