On the HSK 6 vocabulary list, at CEFR level C2.

pāo ㄆㄠ

    • puffed swollen spongy
    • small lake (esp. in place names)
    • classifier for urine or feces

pào ㄆㄠˋ

    • bubble foam
    • blister
    • to soak to steep to infuse
    • to dawdle to loiter
    • to pick up (a girl)
    • to get off with (a sexual partner)
    • classifier for occurrences of an action
    • classifier for number of infusions

Where 泡 is used

Sources