We don't have synonyms for entero yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are enter, enters and estero.
(n) :
(informal) Clipping of enterococcus. [(bacteriology) Any of a group of streptococci bacteria, of the genus Enterococcus, that inhabit the human gastrointestinal tract and have great resistance to antibiotics]
(n) :
(informal) Clipping of enterococcus. [(bacteriology) Any of a group of streptococci bacteria, of the genus Enterococcus, that inhabit the human gastrointestinal tract and have great resistance to antibiotics]