sibling
Another parent's child
A sibling is a brother or sister—someone who shares at least one parent with you.
The term is useful when you want to refer to brothers and sisters collectively without specifying sex: I have three siblings.
Half-siblings share one biological parent; step-siblings are related through marriage rather than blood.
Sibling rivalry describes the competition and jealousy that often arise between children in the same family.
Male with shared parents
- sisterFemale sibling
- twinOne of matched pair
- stepsiblingNon-biological brother or sister
- half-brotherMale sharing one parent
half-sister · stepbrother · stepsister · older · younger · middle · biological · adopted
Blood-connected people
- kindredRelations by blood
- bloodlineAncestry through generations
- familyRelated people together
- relativesThose connected by blood
lineage · clan · consanguinity · genealogy · ancestry · kinfolk · offspring · progeny
State of proximity
- loyaltyFaithful commitment to another
- supportTo uphold or sustain
- rivalryOngoing contest between opponents
- companionshipState of having company
understanding · trust · attachment · camaraderie · affection · empathy · protectiveness · squabbling
Spirit of brotherly connection
- brothersMale children of same parents
- fraternalOf sibling bonds
- comradeshipMutual loyalty among companions
- brotherhoodKinship among men
guild · fellowship · brothers-in-arms · confraternity · brethren · band of brothers
Women's collegiate social organization
- sistersFemale kin or nuns
- sisterlyLike a female sibling
- solidarityUnity among allies
- femininityFemale nature or character
brother
Male with shared parents
- sisterFemale sibling
- twinOne of matched pair
- stepsiblingNon-biological brother or sister
half-brother · half-sister · stepbrother · stepsister · older · younger · middle · biological · adopted · identical
kin
Blood-connected people
relatives · lineage · clan · consanguinity · genealogy · ancestry · kinfolk · offspring · progeny · heritage
closeness
State of proximity
- loyaltyFaithful commitment to another
- supportTo uphold or sustain
- rivalryOngoing contest between opponents
companionship · understanding · trust · attachment · camaraderie · affection · empathy · protectiveness · squabbling · teasing
fraternity
Spirit of brotherly connection
- brothersMale children of same parents
- fraternalOf sibling bonds
- comradeshipMutual loyalty among companions
brotherhood · guild · fellowship · brothers-in-arms · confraternity · brethren · band of brothers
sorority
Women's collegiate social organization
- sistersFemale kin or nuns
- sisterlyLike a female sibling
- solidarityUnity among allies
- family membersmother, father, sister, brother, son
- kinshipmother, father, sister, brother, children
- childhood connectionsbest friend, playmate, classmate, school friend, imaginary friend
- contactsfriend, family, contact list, neighbor, acquaintances
- social rolesparent, child, spouse, teacher, employee
- travel companionsfriend, spouse, partner, husband, wife
siblingstranger
Person not yet known
complete stranger · non-relative · outsider · parent · child
- older siblingFamily member born earlier
- sibling rivalryCompetition between children sharing parents
- half siblingsSiblings sharing one parent
- middle siblingSibling between oldest, youngest
- sibling rivalriesCompetition between brothers/sisters
- sibling bondRelationship between family-born peers
siblings, sibling rivalry, siblinghood, sibling-in-law, siblings-in-law