5 letters:
-atic, attic, batak, catic, katak, matic, patak, vatic

6 letters:
4matic, abatic, attock, battik, cratic, enatic, hattic, isatic, patach, phatic, pratic, seatac, static, uratic, viatic

7 letters:
-cratic, acmatic, akratic, aquatic, astatic, aziatic, comatic, creatic, dematic, ecbatic, ectatic, eleatic, erratic, fanatic, geratic, hematic, hepatic, kreatic, mattick, mattock, nematic, osmatic, sciatic, sematic, simatic, somatic, triatic, u-matic

8 letters:
adriatic, anabatic, animatic, aromatic, bat tick, climatic, commatic, cuneatic, dalmatic, dogmatic, dramatic, ecstatic, emphatic, enneatic, eustatic, gromatic, haematic, illmatic, karmatic, magmatic, muriatic, myotatic, neumatic, noematic, operatic, otomatic, p-static, phreatic, poematic, protatic, pysmatic, rhematic, sabbatic, sarmatic, shattuck, snattock, socratic, static-x, stomatic, systatic, thematic, umbratic, x-static

9 letters:
acrobatic, adiabatic, aerobatic, aliphatic, amacratic, anastatic, anosmatic, apophatic, apostatic, asthmatic, athematic, automatic, axiomatic, biostatic, bregmatic, catabatic, catalatic, choreatic, chromatic, cinematic, diastatic, ectobatic, enigmatic, enzymatic, epistatic, fluviatic, geostatic, grammatic, grammatik, hanseatic, idiomatic, inerratic, ischiatic, isocratic, isostatic, jatimatic, judgmatic, katabatic, kinematic, klezmatic, leviratic, lymphatic, manumatic, metamatic, miasmatic, mydriatic, novomatic, pancratic, plasmatic, pneumatic, pragmatic, prismatic, prostatic, quadratic, rheumatic, rotimatic, schematic, schematik, sinematic, smegmatic, spermatic, stemmatic, stigmatic, stromatic, strumatic, sulphatic, telematic, traumatic, zeugmatic, zygomatic

10 letters:
achromatic, acousmatic, acroamatic, aerostatic, antistatic, apneumatic, aposematic, arithmatic, astigmatic, atraumatic, autocratic, automattic, catagmatic, cataphatic, chiasmatic, cryostatic, cytostatic, democratic, dilemmatic, diplomatic, emblematic, endermatic, episematic, eurasiatic, flow-matic, gyrostatic, hemostatic, hondamatic, hydramatic, hyperbatic, hypostatic, iconomatic, idiocratic, informatic, instamatic, kerygmatic, majestatic, mathematic, melismatic, merismatic, mesocratic, metastatic, mobocratic, monocratic, morganatic, multimatic, numismatic, pancreatic, pathematic, phlegmatic, phonematic, phosphatic, pleromatic, porismatic, rheostatic, rhizomatic, schismatic, smartmatic, stillmatic, subhepatic, systematic, telesmatic, theocratic, timocratic, truismatic, ultramatic, undogmatic, undramatic, unemphatic, unthematic, variomatic

11 letters:
afroasiatic, allosematic, analemmatic, anapeiratic, anathematic, androcratic, anti-static, arith-matic, atelectatic, atheromatic, bioclimatic, biquadratic, blastematic, cariostatic, charismatic, cholestatic, coenzymatic, diastematic, diastomatic, dichromatic, diprismatic, dixiecratic, engrammatic, epidermatic, erythematic, euchromatic, fungistatic, haemostatic, hierocratic, hippocratic, homeostatic, hydrostatic, hyperstatic, insomniatic, isodiabatic, leucocratic, macrosmatic, mahoromatic, metasomatic, microsmatic, nondramatic, nonemphatic, nonthematic, orthostatic, oxymuriatic, perihepatic, phantomatic, photostatic, plutocratic, presocratic, problematic, sensormatic, stana katic, sterigmatic, symptomatic, syntagmatic, theorematic, unidiomatic, veg-o-matic

12 letters:
afro-asiatic, anagrammatic, anallagmatic, anastigmatic, aneurismatic, aneurysmatic, antasthmatic, antiaromatic, aphorismatic, apochromatic, apothegmatic, aristocratic, asymptomatic, bureaucratic, diagrammatic, diplomatique, embolismatic, empyreumatic, enthymematic, epigrammatic, exanthematic, extrahepatic, extrasomatic, genethliatic, gynecocratic, homoeostatic, hypodermatic, intrahepatic, isochromatic, kleptocratic, leptosomatic, melodramatic, meristematic, meritocratic, monodramatic, monothematic, non-aromatic, nonadiabatic, nonautomatic, nonenzymatic, overdramatic, overemphatic, panchromatic, paradigmatic, undiplomatic, physiocratic, polyaromatic, pre-socratic, programmatic, sacrosciatic, stereostatic, stratocratic, subzigomatic, subzygomatic, suprahepatic, technocratic, thermostatic, trichromatic, trigrammatic, tune-o-matic, undemocratic, unsystematic

13 letters:
allochromatic, antiasthmatic, antienzymatic, antipsoriatic, antirheumatic, antistrumatic, apophlegmatic, apotelesmatic, austroasiatic, autopneumatic, bioinformatic, biosystematic, carcinostatic, cardiohepatic, categorematic, chromonematic, cytoplasmatic, diaphragmatic, electrostatic, endolymphatic, enterohepatic, gastrohepatic, gerontocratic, hemolymphatic, homochromatic, hypochromatic, ideogrammatic, idiochromatic, idioplasmatic, idiosyncratic, lipogrammatic, logogrammatic, magnetostatic, metachromatic, monochromatic, monogrammatic, nitromuriatic, non-automatic, nondemocratic, nonmetastatic, paleo-asiatic, paleoclimatic, pantisocratic, paraschematic, perilymphatic, periprostatic, phrenohepatic, pleochromatic, polychromatic, posttraumatic, psychosomatic, puboprostatic, semiautomatic, strat-o-matic, synallagmatic, unproblematic

14 letters:
65daysofstatic, amphichromatic, anisochromatic, antidemocratic, antiperistatic, apophthegmatic, austro-asiatic, bacteriostatic, blastodermatic, cruise-o-matic, cycloaliphatic, heteroaromatic, hierogrammatic, hydropneumatic, hyperchromatic, orthochromatic, pantopragmatic, photochromatic, post-traumatic, presymptomatic, protoplasmatic, psychodramatic, sarcoplasmatic, semi-automatic, telangiectatic, tetrachromatic, thalassocratic

15 letters:
frontozygomatic, gastropneumatic, heterochromatic, knight-er-ratic, leucophlegmatic, nucleoplasmatic, philomathematic, pseudaposematic, squamozygomatic, tuberculostatic, vesicoprostatic, xanthochromatic

16 letters:
hyperoxymuriatic, subdiaphragmatic, syncategorematic, thymicolymphatic, turbo-hydramatic

17 letters:
acromonogrammatic, phototrichromatic

18 letters:
atmospheric static, parallelogrammatic, supradiaphragmatic

6 letters:
chadic, lappic

7 letters:
bacchic, arcadic, nomadic, aphakic

8 letters:
syllabic, sporadic

10 letters:
unsyllabic

11 letters:
hemorrhagic, nonsyllabic

12 letters:
polysyllabic, haemorrhagic

14 letters:
bacteriophagic