Clinker \Clink"er\ (kl[i^][ng]k"[~e]r), n. [From clink; cf. D. clinker a brick which is so hard that it makes a sonorous sound, from clinken to clink. Cf. Clinkstone.]

1. A mass composed of several bricks run together by the action of the fire in the kiln. [1913 Webster]

2. Scoria or vitrified incombustible matter, formed in a grate or furnace where anthracite coal in used; vitrified or burnt matter ejected from a volcano; slag. [1913 Webster]

3. A scale of oxide of iron, formed in forging. [1913 Webster]

4. A kind of brick. See Dutch clinker, under Dutch. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

94 Moby Thesaurus words for "clinker": adobe, alluvion, alluvium, ash, ashes, ashlar, atonalism, atonality, brand, brick, bricks and mortar, cacophony, calx, carbon, cement, charcoal, cinder, coal, coke, concrete, coom, covering materials, deposition, deposits, diluvium, discord, discordance, discordancy, disharmony, dissonance, dissonancy, dissonant chord, draff, dregs, dross, ember, feces, ferroconcrete, firebrick, flag, flagstone, flatness, flooring, froth, fume, grounds, inharmoniousness, inharmony, lath and plaster, lava, lees, loess, masonry, moraine, mortar, off note, offscum, pavement, paving, paving material, plasters, precipitate, precipitation, prestressed concrete, reek, roofage, roofing, scoria, scum, sediment, settlings, sharpness, siding, silt, sinter, slag, smoke, smudge, smut, soot, sour note, sourness, stone, stridor, sublimate, sullage, tile, tiling, tunelessness, unharmoniousness, unmusicality, untunefulness, walling, wolf

Source: Moby Thesaurus II by Grady Ward, 1.0
 

clinker

Source: WordNet (r) 2.0
 

Clinker \Clink"er\ (kl[i^][ng]k"[~e]r), n. [From clink; cf. D. clinker a brick which is so hard that it makes a sonorous sound, from clinken to clink. Cf. Clinkstone.]

1. A mass composed of several bricks run together by the action of the fire in the kiln.

2. Scoria or vitrified incombustible matter, formed in a grate or furnace where anthracite coal in used; vitrified or burnt matter ejected from a volcano; slag.

3. A scale of oxide of iron, formed in forging.

4. A kind of brick. See Dutch clinker, under Dutch.

Source: Webster's Revised Unabridged Dictionary (1913)