Addle \Ad"dle\, v. t. & i. [imp. & p. p. Addled; p. pr. & vb. n. Addling.]

To make addle; to grow addle; to muddle; as, he addled his brain. "Their eggs were addled." --Cowper. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

76 Moby Thesaurus words for "addled": addlebrained, addleheaded, addlepated, at a loss, baffled, bamboozled, beat, beclouded, beery, befuddled, bemused, besotted, blear-witted, blind drunk, buffaloed, cloudy, confounded, crapulent, crapulous, dazed, dizzy, drenched, drunk, drunken, far-gone, floored, flustered, fogged, foggy, fou, fuddlebrained, fuddled, full, gay, giddy, glorious, happy, hazy, in a dilemma, in a fog, in a muddle, in liquor, in suspense, inebriate, inebriated, inebrious, intoxicated, jolly, licked, maudlin, mellow, merry, misted, misty, muddled, muddleheaded, muddybrained, muzzy, mystified, nappy, nonplussed, on tenterhooks, perplexed, puzzled, puzzleheaded, reeling, scramblebrained, shikker, sodden, sotted, stuck, stumped, thrown, tiddly, tipsy, under the influence

Source: Moby Thesaurus II by Grady Ward, 1.0
 

addled adj
1: (of eggs) no longer edible; "an addled egg"
2: confused and vague; used especially of thinking; "muddleheaded ideas"; "your addled little brain"; "woolly thinking"; "woolly-headed ideas" [syn: befuddled, muddled, muzzy, woolly, wooly, woolly-headed, wooly-minded]

Source: WordNet (r) 2.0
 

Addle \Ad"dle\, v. t. & i. [imp. & p. p. Addled; p. pr. & vb. n. Addling.]

To make addle; to grow addle; to muddle; as, he addled his brain. ``Their eggs were addled.'' --Cowper.

Source: Webster's Revised Unabridged Dictionary (1913)