cypher

[1]	code , encipher , cipher , encrypt , inscribe , write in code
[2]	calculate , cipher , compute , work out , reckon , figure

[1]	zero , 0 , nought , cipher
[2]	nothing , nil , nix , nada , null , aught , cipher , goose egg , naught , zero , zilch , zip , zippo
[3]	cipher , nobody , nonentity
[4]	cipher , cryptograph , secret code
[5]	cipher