Emma has many, many words now. Its just a matter of listening closely to what she is saying and the context within which she is saying the words, and you can tell exactly what she is saying.
She calls Michael and Samantha a lot.
Michael sounds like "Mu-kail"
But I think the cutest is Samantha - she calls her "Sissy". When she calls Samantha, she yells "Sissy" and Samantha will come running.