general word that includes "brothers" and "sisters"
SIBLING
somebody who works in the same place as you
COLLEAGUE / WORKMATE
your son's daughter
GRANDDAUGHTER
Your partner's mother
MOTHER-IN-LAW
your mother's brother's son
COUSIN
a person who belongs to your family: R....
RELATIVE
your son's son
GRANDSON
The woman you are married to
WIFE
two children who were born on the same day and look identical
TWINS
Your partner's brother
BROTHER-IN-LAW
your father marries another woman and then has a daughter with her. That girl is your...
HALF-SISTER
somebody who lives in the same area as you
NEIGHBOUR
Your partner's son
STEP-SON
Another word for "partner": C....
COUPLE
Your brother's daughter
NIECE
your mother's brother
UNCLE
somebody you know, but who is not your friend
ACQUAINTANCE
Your brother's son
NEPHEW
Your grandmother's mother
GREAT-GRANDMOTHER
your mother's sister
AUNT
your sons and daughters are your...
CHILDREN
The man you are married to
HUSBAND
the man you have a romantic relationship with
BOYFRIEND
a person (not part of your family) you share your flat with
FLATMATE / ROOMMATE