Tandem repeat

About

Words that have an adjacent repeat of three or more letters. I've omitted most words ending in "-inging" where both g's are hard. I've excluded words composed solely of repeats and the plurals of those words (e.g., murmur, murmurs), but some are included on Isograms. See also oroboros's Toot Toot, Beep Beep! and adoarns' Reduplicatives.

Three letter repeats found so far: ach, alc, alf, all, alm, alt, and, ang, anh, ani, ans, ant, any, are, arn, ars, art, ase, ask, ass, ast, atc, ati, axo, ays, bar, ber, bis, boo, bor, bou, cea, cha, che, chi, cin, coa, dan, dee, der, ent, ers, est, eth, far, gan, gar, gin, hoe, hoo, hua, hue, ian, ier, ill, ing, iqu, ism, iss, ite, jou, kan, kas, kin, koo, lfa, loo, mar, mia, nan, nga, ngo, nia, noo, nou, nse, nte, olo, ong, ool, ono, ons, oon, oph, orr, ous, out, pal, pee, per, pho, poo, pou, pre, pro, pur, qua, que, qui, quo, rat, rea, san, sce, sch, ses, sha, shi, sho, ssi, tan, tar, tas, ter, tes, the, tic, tin, tou, tri, tzi, ump, val, wee, xiu, zam, zyu.

Four letter repeats: anti, atin, chis, cous, cuba, gneu, hole, humu, kupu, nuku, para, sero, unuk.

Five letter repeats: micro, zenzi.

Six letter repeats: pseudo.