The Collaborative International Dictionary of English v.0.48:

Spear \Spear\, n. [OE. spere, AS. spere; akin to D. & G. speer,
   OS. & OHS. sper, Icel. spj["o]r, pl., Dan. spaer, L. sparus.]
   1. A long, pointed weapon, used in war and hunting, by
      thrusting or throwing; a weapon with a long shaft and a
      sharp head or blade; a lance.

   Note: [See Illust. of Spearhead.] "A sharp ground spear."
         --Chaucer.
         [1913 Webster]

               They shall beat their swords into plowshares, and
               their spears into pruning hooks.   --Micah iv. 3.
         [1913 Webster]

   2. Fig.: A spearman. --Sir W. Scott.
      [1913 Webster]

   3. A sharp-pointed instrument with barbs, used for stabbing
      fish and other animals.
      [1913 Webster]

   4. A shoot, as of grass; a spire.
      [1913 Webster]

   5. The feather of a horse. See Feather, n., 4.
      [1913 Webster]

   6. The rod to which the bucket, or plunger, of a pump is
      attached; a pump rod.
      [1913 Webster]

   Spear foot, the off hind foot of a horse.

   Spear grass. (Bot.)
      (a) The common reed. See Reed, n., 1.
      (b) meadow grass. See under Meadow.

   Spear hand, the hand in which a horseman holds a spear; the
      right hand. --Crabb.

   Spear side, the male line of a family. --Lowell.

   Spear thistle (Bot.), the common thistle (Cnicus
      lanceolatus).
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

71 Moby Thesaurus words for "spear side":
   affiliation, agnate, ancestry, apparentation, birth, blood,
   blood relation, blood relative, bloodline, branch, breed, clansman,
   cognate, collateral, collateral relative, common ancestry,
   connections, consanguinean, consanguinity, derivation, descent,
   direct line, distaff side, distant relation, enate, extraction,
   family, female line, filiation, flesh, flesh and blood, folks,
   german, house, kin, kindred, kinfolk, kinnery, kinsfolk, kinsman,
   kinsmen, kinswoman, kith and kin, line, line of descent, lineage,
   male line, near relation, next of kin, people, phylum, posterity,
   race, relations, relatives, seed, sept, sib, sibling, side,
   spear kin, spindle kin, spindle side, stem, stirps, stock, strain,
   succession, sword side, tribesman, uterine kin