brad, n. [Cf. OE. brod, Dan. braad prick, sting, brodde ice spur, frost nail, Sw. brodd frost nail, Icel. broddr any pointed piece of iron or stell; akin to AS. brord point, spire of grass, and perh. to E. bristle. See Bristle, n.].

A thin nail, usually small, with a slight projection at the top on one side instead of a head; also, a small wire nail, with a flat circular head; sometimes, a small, tapering, square-bodied finishing nail, with a countersunk head. [1913 Webster]

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OXFORD DICTIONARY

brad, n. a thin flat nail with a head in the form of slight enlargement at the top.

Etymology

var. of ME brod goad, pointed instrument, f. ON broddr spike

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ROGET THESAURUS

brad

Connection

N connection, vinculum, link, connective, connection, junction, bond of union, copula, hyphen, intermedium, bracket, bridge, stepping-stone, isthmus, bond, tendon, tendril, fiber, cord, cordage, riband, ribbon, rope, guy, cable, line, halser, hawser, painter, moorings, wire, chain, string, fastener, fastening, tie, ligament, ligature, strap, tackle, rigging, standing rigging, running rigging, traces, harness, yoke, band ribband, bandage, brace, roller, fillet, inkle, with, withe, withy, thong, braid, girder, tiebeam, girth, girdle, cestus, garter, halter, noose, lasso, surcingle, knot, running knot, cabestro, cinch, lariat, legadero, oxreim, suspenders, pin, corking pin, nail, brad, tack, skewer, staple, corrugated fastener, clamp, U-clamp, C-clamp, cramp, cramp iron, ratchet, detent, larigo, pawl, terret, treenail, screw, button, buckle, clasp, hasp, hinge, hank, catch, latch, bolt, latchet, tag, tooth, hook, hook and eye, lock, holdfast, padlock, rivet, anchor, grappling iron, trennel, stake, post, cement, glue, gum, paste, size, wafer, solder, lute, putty, birdlime, mortar, stucco, plaster, grout, viscum, shackle, rein, prop.

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