Find Antonyms
brother Antonyms
Opposite of brother
Because the opposite of brother shifts with each meaning, the 11 antonyms and opposite words below are separated across 4 exact definitions and ranked by contrast strength.
• noun (Context 1)
A man or boy in relation to other sons and daughters of his parents; a male sibling.
Usage Example
"My older sister taught me how to ride a bicycle when I was six."
Strongest
sister
• noun (Context 2)
A male associate, comrade, or fellow member of a fraternity, trade union, or shared cause.
Usage Example
"He addressed his union brothers at the annual labor conference."
Strong
enemy
foe
adversary
opponent
rival
• noun (Context 3)
A male member of a Christian religious order who is not ordained as a priest, or a title given to such a member.
Usage Example
"The monastery was tended by a quiet community of lay brothers."
Strongest
nun
sister
Strong
layperson
• verb (Context 4)
To treat, address, or act toward someone as a brother.
Usage Example
"The veteran players quickly brothered the young rookie and helped him adjust to the team."
Strong
alienate
shun
ostracize
Similar words to brother
Words similar to brother shift depending on context. Common synonyms include:
bro
monk
comrade
friar
confrere
man
boy
brer
• Nearby Words
Cite this Entry
Wordmom. (2026). Antonyms for Brother. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/brother