After you cross everyone's favourite mumma and dadda off the list, there are lot of words to teach baby. Labelling, or teaching words for things and objects you interact with, is easy, and there are also a lot of action and descriptive words that are easier than others for baby to add to their vocabulary.
Here are some to try:
hello/ goodbye
run/ walk
big/ small
fast/ slow
yes/ no
open/ close
please/ thank you
help
come
look/see
gone
again
more
done
yummy/ yucky
eat/ drink
up/ down
loud/ quiet
sleep
on/ off
happy/ sad
funny
play
here/ there
wash
dirty/ clean
go/ stop
give
hot/ cold
kiss/ hug
read
tickle
TIP: Wondering how many words to expect and when? According to Babycenter, by 18 mos baby can be speaking 5, understanding up to 50, from 18-24 mos – speaking 50-75, understanding 200 and will start putting simple words together.