Babys first words

My god daughter will be 18 months old the beginning of august, she already says tons of words, but we are trying to teach her some more, what are some words that would be easy for a baby to learn?

The words she already says- mama, woof woof, pup pup, kitty, meow,tweet tweet, spongebob “bun-ba”, bottle “baba”, baby is also baba but there is a difference, no, mine, eww, stinky, cool, fish, bella, bunny, bye bye, hi, haley-go-bye, drink… She has said my name a couple times “emmalie” when shes mad and wanted me to pay attention to her, but normally calls me “em-mama” Like I said, she says quite a few words, and also knows the noise a bird, cat, dog, horse, pig, duck, and gary from spongebob make.. Also she says “mmm” when she wants food.. And a whole bunch of other words that no one understands yet.. She has never said dada, because he has been in iraq for most of her life.. So she doesnt know what dada is..

Any ideas?

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