This is the 335th most frequent Vietnamese word.
hoa
"Hoa" in Vietnamese means "flower."
In this sentence, 'hoa' refers to flowers in the context of nature.
Hoa đang nở rộ trong vườn.
The flowers are blooming in the garden.
The word 'hóa' here is part of a compound word, referring to chemistry.
Anh ấy đã nhận được bằng kỹ sư hóa.
He obtained a chemical engineering diploma.
Here, 'Hoa' is used as a proper noun - a name of a person.