heroine ~ heroin:
[‘heroine’ rhymes with ‘heroin’, but ‘heron’ has a different second vowel sound]

top heroines
“Heroine”, for the right pronunciation, please click here,
is ‘the main female character in a play (drama), story or film (movie); a woman remembered for her bravery and courage’,
e.g.
Sandra Bullock has been the heroine in several box-office hit films.
Nobel Laureate, Aung San Suu Kyi, hailed as the Symbol of Hope, is the heroine of many a pro-democracy supporter world over.
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heroin, the banned drug
“Heroin”, for the right pronunciation, please click here,
is ‘a narcotic drug made from a substance called morphine, used for making patients sleep or get relief from severe pain or great worry; one of the drugs taken by drug addicts (druggies)’,
e.g.
He is a druggie; he is addicted to heroin.
The doctor gave an injection of heroin to the patient suffering from nervous breakdown to put him to sleep.
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a heron in flight
“Heron”, for the right pronunciation, please click here,
is ‘a kind of water-bird with long, thin legs’,
e.g.
At the lake near our village, bird-watchers gather to watch the different kinds of water-birds that include cranes, egrets and herons.
