The Collaborative International Dictionary of English v.0.48:

Consanguinity \Con`san*guin"i*ty\, n. [L. consanguinitas: cf. F.
   consanguintit['e].]
   The relation of persons by blood, in distinction from
   affinity or relation by marriage; blood relationship; as,
   lineal consanguinity; collateral consanguinity.
   [1913 Webster]

         Invoking aid by the ties of consanguinity. --Prescott.
   [1913 Webster]

WordNet (r) 3.0 (2006):

consanguinity
    n 1: (anthropology) related by blood [syn: consanguinity,
         blood kinship, cognation] [ant: affinity]

Moby Thesaurus II by Grady Ward, 1.0:

72 Moby Thesaurus words for "consanguinity":
   affiliation, affinity, agnation, alliance, ancestry, apparentation,
   birth, blood, blood relationship, bloodline, branch, breed,
   brotherhood, brothership, cognation, common ancestry,
   common descent, common source, common stock, connection,
   cousinhood, cousinship, derivation, descent, direct line,
   distaff side, enation, extraction, family, family relationship,
   fatherhood, female line, filiation, fraternity, house, kindred,
   kinship, line, line of descent, lineage, male line, maternity,
   matrilineage, matriliny, matrisib, matrocliny, motherhood,
   paternity, patrilineage, patriliny, patrisib, patrocliny, phylum,
   propinquity, race, relation, relationship, seed, sept, sibship,
   side, sisterhood, sistership, spear side, spindle side, stem,
   stirps, stock, strain, succession, sword side, ties of blood