Answer:
4-letter words
alec, bloc, disc, emic, epic, etic, exec, fisc, flic, floc, huic, laic, marc, narc, odic, otic, pyic, spec, sync, talc, torc, uric, zinc, zoic
5-letter words
adunc, amnic, antic, areic, asdic, aspic, attic, aulic, auric, azoic, baric, basic, boric, bronc, daric, domic, duroc, ethic, franc, gamic, genic, havoc, hemic, humic, ileac, iliac, iodic, ionic, lilac, linac, logic, lotic, ludic, lyric, lytic, mafic, magic, malic, manic, medic, melic, mesic, mimic, music, naric, ohmic, oleic, ontic, optic, orgic, osmic, panic, pubic, pudic, pyric, rabic, rebec, relic, runic, salic, sepic, serac, sodic, sonic, stoic, sumac, taroc, telic, tonic, topic, toric, toxic, triac, tunic, typic, umiac, ureic, vatic, vinic, xebec, xenic, xeric, yogic, yonic, zebec
6-letter words
abulic, adipic, aeonic, agamic, agaric, agonic, amebic, amidic, aminic, amtrac, amylic, anemic, anisic, anodic, anomic, anoxic, anuric, aortic, apneic, arabic, atavic, ataxic, atelic, atomic, atonic, atopic, atypic, axenic, axonic, azonic, azotic, bardic, beylic, bionic, biotic, bonduc, bromic, bustic, deific, deltic, dermic, dezinc, dyadic, edenic, emetic, enatic, enolic, erotic, ethnic, exilic, exonic, exotic, fabric, fennec, ferric, filmic, fistic, formic, frolic, fundic, fungic, fustic, gallic, galyac, garlic, geodic, gestic, gnomic, gothic, guaiac, gweduc, haemic, haptic, heliac, herdic, heroic, holmic, hydric, hyenic, hypnic, iambic, iatric, imidic, irenic, iridic, iritic, ironic, italic, karmic, lentic, limbic, limnic, lithic, lubric, luetic, maniac, manioc, mantic, mastic, metric, miotic, mosaic, muonic, myopic, myotic, mystic, mythic, nastic, neumic, niobic, nitric, noetic, nordic, nostoc, oomiac, orgiac, orphic, otitic, ovisac, ovonic, oxalic, oxidic, ozonic, parsec, pelvic, peptic, phasic, phatic, phobic, phonic, photic, phylic, physic, pianic, pionic, poetic, ptotic, public, pyemic, pyknic, quinic, rhodic, rubric, rustic, septic, sialic, sorbic, static, stelic, steric, syndic, tambac, tannic, tanrec, tarmac, tenrec, terbic, thetic, thoric, thymic, toluic, tombac, tragic, tropic, unific, uranic, uratic, uremic, uretic, viatic, vitric, yttric, zodiac
7-letter words
abiotic, aboulic, aerobic, agapeic, aggadic, agnatic, agravic, albinic, albitic, alembic, alkalic, alkylic, allelic, allylic, almanac, aloetic, ammonic, amnesic, amoebic, anaemic, anergic, angelic, anionic, anosmic, aphasic, aphetic, aphonic, aphotic, aplitic, apnoeic, apogeic, apraxic, aquatic, argotic, arsenic, aseptic, astatic, augitic, auxetic, auxinic, avionic, baldric, barytic, basilic, bawdric, benefic, benthic, benzoic, bibasic, biontic, biopsic, bioptic, bivouac, boronic, botanic, bubonic, bulimic, butyric, daturic, deistic, deltaic, demonic, demotic, dharmic, dibasic, dimeric, dineric, diploic, dipodic, disomic, drastic, druidic, dryadic, dunitic, dynamic, dysuric, edaphic, eidetic, eidolic, eirenic, ekistic, elastic, elegiac, embolic, empiric, endemic, enteric, entopic, enzymic, eosinic, epeiric, ephebic, epigeic, epizoic, erethic, ergodic, ergotic, eristic, erratic, etheric, ethylic, eugenic, eupneic, exosmic, fanatic, faradic, fatidic, flueric, fluidic, fluoric, frantic, fumaric, futharc, futhorc, galenic, gametic, gastric, generic, genetic, genomic, georgic, glottic, glyphic, glyptic, gnathic, gnostic, gonadic, gonidic, graphic, hagadic, halakic, hebetic, hedonic, hematic, hepatic, heretic, hexadic, hyaenic, hypoxic, identic, idiotic, idyllic, illitic, illogic, isthmic, jaditic, jalapic, juridic, karstic, kenotic, keramic, ketonic, ketotic, kinesic, kinetic, lexemic, lipidic, litotic, lunatic, malefic, mantric, masonic, medevac, meiotic, melanic, melodic, meropic, mesonic, metopic, miasmic, mimetic, mitotic, mollusc, monadic, monodic, moronic, morphic, motific, motivic, motoric, muntjac, myalgic, myrrhic, nematic, nephric, nepotic, neritic, nomadic, noritic, numeric, oghamic, omnific, oneiric, oolitic, oologic, ophitic, opsonic, organic, osmatic, osmotic, ossific, otalgic, paretic, parodic, parotic, pelagic, pelitic, peloric, phallic, phrenic, piratic, plasmic, plastic, plumbic, poditic, polemic, politic, potamic, priapic, prosaic, prussic, psalmic, psoatic, puranic, pyaemic, pyloric, pyretic, pyrexic, pyridic, pyritic, pyrrhic, quadric, quantic, quartic, quintic, rheumic, rhombic, robotic, rubidic, sapphic, satanic, satiric, satyric, sebasic, seismic, selenic, sematic, shellac, shoepac, sibylic, skaldic, skeptic, somatic, somitic, soritic, spastic, spathic, spermic, sphenic, spheric, splenic, stannic, stearic, sthenic, strobic, styptic, suberic, subfusc, sylphic, synodic, tabetic, tantric, taxemic, taxitic, telomic, terebic, tetanic, thallic, theriac, thermic, thiolic, thionic, titanic, tonemic, tonetic, totemic, toxemic, traffic, triadic, trismic, trophic, tryptic, tyronic, umbonic, uraemic, uveitic, valeric, vanadic, venatic, veridic, vinylic, viremic, vivific, voltaic, xanthic, xerotic, yashmac, zebraic, zygotic, zymotic