I wouldn't say DS has many words beyond mama and dada. He does sign milk, more and please (the only three signs I do regularly!).
He babbles constantly. He also regularly says, rahrah, lala, baba, mummum, nahnah, uhhh, oh!
It is not always clear what his words mean. For instance, dada means daddy, but also 'that over there' and 'hey look at that dog'.
Mama is in reference to me, nursing, 'i've bumped my head and need a cuddle', 'more of that'.