Chinese words with 号 character meaning (HSK)

HAO4
day of a month, (suffix used after) name of a ship, (ordinal) number

HAO4, MA3
number

GUA4, HAO4
to register (at a hospital), to send by registered mail

XIN4, HAO4
signal

CHENG1, HAO4
name, term of address, title

FU2, HAO4
symbol, mark, sign

HAO4, ZHAO4
to call, to appeal