We don't have synonyms for equals sign yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are equal sign and equals signs.
(n) :
Alternative form of equal sign. [A symbol (=) used in mathematics to indicate that two values are the same, and elsewhere in various other ways, such as (formerly) to separate the signature from the content of a telegram.]
(n) :
Alternative form of equal sign. [A symbol (=) used in mathematics to indicate that two values are the same, and elsewhere in various other ways, such as (formerly) to separate the signature from the content of a telegram.]