As a noun, it's a synonym for "flower", as a verb, it's to blossom or come into one's own
us  /blsm/. .  a flower, or all the flowers on a tree... [DOC] [TLE] bloom Definition in the Cambridge English Dictionary [PAR] bloom definition, meaning, what is bloom: When a flower blooms, it opens or is 
open, and when a plant or tree blooms it produces.