3 letters:
gaf, raf

4 letters:
calf, gaff, graf, haff, half, laff, naff, paff, raff, taff

5 letters:
assaf, baffe, blaff, braff, caffe, chaff, dmaff, draff, fraph, gaffe, graef, graff, grafh, graph, kaffe, nyaff, pfaff, rnlaf, scaff, schaf, shafe, shaff, skaff, spaff, staff, staph, straf, taffe, traff, wgaff, yaffe

6 letters:
-graph, behalf, carafe, decaff, elaphe, graefe, graeff, graphe, mb aff, piaffe, pilaff, schaff, schlaf, sclaff, straff, unitaf, urssaf

7 letters:
amstaff, distaff, enchafe, epitaph, giraffe, jidlaph, metcalf, schlaff, sielaff

8 letters:
abiasaph, anagraph, apograph, bedstaff, belstaff, biograph, box calf, cenotaph, chargaff, colstaff, cybercaf, diagraph, duograph, epigraph, falstaff, fly-half, gibstaff, giffgaff, hubstaff, isograph, llandaff, mid-calf, mooncalf, myograph, odograph, olograph, one-half, orograph, outlaugh, prograph, riffraff, sea-calf, siggraph, syngraph, tipstaff, wagstaff

9 letters:
aerograph, allograph, altigraph, arcograph, autograph, auxograph, backstaff, barograph, bar graph, bolograph, cerograph, colestaff, cowlstaff, cymograph, echograph, eidograph, ergograph, flagstaff, forestaff, gyrograph, hackstaff, hodograph, holograph, homograph, ideograph, j.c.staff, jackstaff, kymograph, last half, logograph, longstaff, manograph, marigraph, melograph, monograph, moon-calf, motograph, oleograph, oncograph, ondograph, optigraph, osmograph, overstaff, paragraph, pedograph, pikestaff, pinkstaff, podoscaph, polygraph, pyrograph, riff-raff, risograph, rotograph, skiagraph, sonograph, telegraph, tonograph, topograph, tragelaph, typograph, vitagraph, waitstaff, whipstaff, xerograph, xylograph

10 letters:
anemograph, astrograph, autographe, bathyscaph, bibliotaph, broomstaff, capnograph, chiffchaff, chinagraph, chirograph, chorograph, climograph, clinograph, collagraph, collograph, curvograph, cyclograph, dictagraph, dictograph, diplograph, dittograph, first half, grandstaff, grindstaff, half-staff, hectograph, hektograph, histograph, hyalograph, hydrograph, hyetograph, hygrograph, hypergraph, iconograph, intergraph, jellygraph, labiograph, lithograph, macrograph, mammograph, mareograph, metrograph, micrograph, mimeograph, multigraph, nephograph, noctograph, orthograph, paleograph, pallograph, pantagraph, pantograph, pelvigraph, petrograph, phonograph, photograph, pianograph, pictograph, pornograph, protograph, reprograph, roneograph, scenograph, scotograph, shandygaff, sillograph, sismograph, spirograph, stenograph, stylograph, swordstaff, tachograph, tremograph, understaff, vibrograph, waltograph, wringstaff, zincograph

11 letters:
anapnograph, bickerstaff, biggerstaff, brontograph, chiff-chaff, choreograph, chromograph, chronograph, cinemograph, comptograph, coronagraph, coronograph, crescograph, cross-staff, cryptograph, dendrograph, dynamograph, gastrograph, glossograph, glyphograph, glyptograph, golden calf, hythergraph, kinetograph, loxodograph, odontograph, onychograph, palatograph, papyrograph, pendergraph, phlebograph, phrenograph, pousse-cafe, psalmograph, pseudograph, psychograph, sales staff, scintigraph, second half, seismograph, selenograph, spherograph, stereograph, stethograph, stevengraph, thermograph

12 letters:
animatograph, ceraunograph, dermatograph, electrograph, ellipsograph, elliptograph, galvanograph, harmonograph, hysterograph, keraunograph, klydonograph, laryngograph, magnetograph, mechanograph, metallograph, meteorograph, office staff, opisthograph, oscillograph, pantelegraph, phraseograph, quarterstaff, reflexograph, rephotograph, scattergraph, schnittlaugh, shelter-half, spectrograph, sphygmograph, stathmograph, subparagraph, telautograph

13 letters:
addressograph, chromatograph, general staff, half-and-half, jacob's staff, oroheliograph, pan-telegraph, phonautograph, pneumatograph, pseudepigraph, schematograph, service staff, thermetograph

14 letters:
anaglyptograph, barometrograph, chief of staff, encephalograph, hogwarts staff, laurie metcalf, microbarograph, myocardiograph, openscenegraph, perspectograph, phototelegraph, plethysmograph, polysomnograph, radioautograph, radiotelegraph, research staff, roentgenograph, security staff, telemetrograph, telephotograph, ultrasonograph

15 letters:
anemometrograph, astrophotograph, autochronograph, barothermograph, echocardiograph, electromyograph, haemadromograph, hydrometrograph, macrophotograph, micropantograph, microphotograph, noematachograph, photoheliograph, photolithograph, photomacrograph, photomicrograph, photonephograph, photozincograph, radiophotograph, tele-iconograph, telestereograph, telethermograph, thermobarograph, time and a half

16 letters:
aerometeorograph, bathythermograph, chromolithograph, chromophotograph, chronophotograph, electrokymograph, hygrothermograph, microseismograph, phonocardiograph, photochronograph, pneumotachograph, radio-phonograph, telemeteorograph, thermometrograph, x-ray photograph

17 letters:
maintenance staff, mass spectrograph, radiometeorograph, sir john falstaff, spectroheliograph

18 letters:
cardiosphygmograph, echoencephalograph, electrocardiograph, electroretinograph, headquarters staff, sound spectrograph, wireless telegraph

19 letters:
ballistocardiograph, electro-chronograph, the daily telegraph

20 letters:
barothermohygrograph

21 letters:
chromophotolithograph, electroencephalograph, joint chiefs of staff

24 letters:
pakistan tehreek-e-insaf