brother

nouns

a male with the same parents as someone else
"my brother still lives with our parents"
is derived from
antonym
a male person who is a fellow member (of a fraternity or religion or other group)
"none of his brothers would betray him"
is a member of
people engaged in a particular occupation
"the medical fraternity"
domain category
a strong belief in a supernatural power or powers that control human destiny
"he lost his faith but not his morality"
is a type of (narrower)
one of the persons who compose a social group (especially individuals who have joined and participate in a group organization)
"only members will be admitted"; "a member of the faculty"; "she was introduced to all the members of his family"
a close friend who accompanies his buddies in their activities
used as a term of address for those male persons engaged in the same movement
"Greetings, comrade!"