Aider

Definition:

(n.) One who, or that which, aids.

Compare aider with other words:

aider vs. rider

aider vs. cider

aider vs. raider

adder vs. aider

aider vs. alder

aider vs. airer

aider vs. hider

aider vs. sider

aided vs. aider

aider vs. eider

aider vs. aimer

abider vs. aider

aider vs. assist