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From letters P, H, Y, S, I, O, L, O, G, I, C, A, L, L, Y  I made following words

15 letter words

physiologically[29]

13 letter words

physiological[24]

12 letter words

philological[20]

11 letter words

physiologic[22]

10 letter words

psychology[24], physically[23], physiology[22]

9 letter words

phycology[23], lyophilic[19], haplology[18], philology[18], logically[15], poolhalls[14], illogical[12]

8 letter words

physical[18], glycosyl[17], chillily[16], apiology[14], poolhall[13], alcohols[13], socially[13], pollical[12], illogics[11]

7 letter words

glyphic[18], aphylly[18], sylphic[17], glycyls[16], clayish[15], apishly[15], alphyls[15], phyllos[15], phallic[14], pachisi[14], caliphs[14], isopach[14], spicily[14], calypso[14], apology[13], glycols[13], loyally[13], lochial[12], alcohol[12], ischial[12], challis[12], chillis[12], scholia[12], chollas[12], coolish[12], shallop[12], hooplas[12], allylic[12], locally[12], loopily[12], lollopy[12], soapily[12], polyols[12], gasohol[11], scallop[11], collops[11], scollop[11], logical[10], illogic[10], hilloas[10], halloos[10], holloas[10], gallops[10], apologs[10], sillily[10], lapilli[9], apollos[9], lollops[9]

6 letter words

sylphy[17], phylic[16], poachy[16], physic[16], scyphi[16], psycho[16], glyphs[15], glycyl[15], chally[14], chilly[14], alphyl[14], phyllo[14], coyish[14], choosy[14], plashy[14], poshly[14], caliph[13], phasic[13], policy[13], ghylls[13], goyish[13], copays[13], cohogs[12], cagily[12], glycol[12], holily[12], shoaly[12], yahoos[12], chilli[11], lochia[11], cholla[11], phalli[11], hoopla[11], ischia[11], laichs[11], chilis[11], lichis[11], chills[11], cholas[11], cashoo[11], cholos[11], school[11], palish[11], phials[11], poisha[11], polish[11], lacily[11], coolly[11], polyol[11], cosily[11], psylla[11], plical[10], collop[10], laighs[10], galosh[10], golosh[10], copals[10], logily[10], gallic[9], hilloa[9], halloo[9], holloa[9], gallop[9], apolog[9], glacis[9], logics[9], hallos[9], hollas[9], hillos[9], cologs[9], hollos[9], galops[9], oilily[9], allyls[9], aliyos[9], alloys[9], apollo[8], lollop[8], sialic[8], silica[8], lilacs[8], scilla[8], social[8], locals[8], saloop[8], polios[8], sigloi[7], igloos[7], isolog[7], aiolis[6]

5 letter words

poach[12], pooch[12], cohog[11], laich[10], chili[10], lichi[10], chill[10], chiao[10], chola[10], loach[10], achoo[10], cholo[10], phial[10], chais[10], chias[10], clash[10], laigh[9], pical[9], plica[9], copal[9], logic[8], hallo[8], holla[8], hillo[8], colog[8], hollo[8], galop[8], clags[8], cilia[7], iliac[7], lilac[7], local[7], polio[7], glial[6], logia[6], igloo[6], logoi[6], ilial[5], aioli[5]