These indefinite pronouns are also very common.
qualquer = whicever one, whatever
bastante = plenty
tanto(a) = so much, many
qualquer > Pode usar qualquer um. (You can use whichever one.)
bastante > Me divirto bastante. (I have plenty of fun.)
tanto > Ele te ama tanto. (She loves you so much.)
tanta > Temos tanta coisa. (We have so much.)