11 letters
- grapholects22
- graptolites17
- grasshopper21
- greaseproof19
- greenhearts16
- hagioscopes21
- haircutters17
- halomorphic25
- haplologies20
- harpsichord22
- hearthstone16
- heartstring16
- heartthrobs18
- hectographs23
- hectoliters17
- hectometers19
- hedgehopper24
- helicopters20
- heliographs21
- heliometers17
- heliotropes17
- heliotropic20
- hematocrits19
- hematologic22
- hemorrhages20
- hemorrhagic23
- hemstitcher21
- hepatocytes21
- hepatotoxic26
- heptachlors22
- heptameters19
- heptarchies21
- heresiarchs18
- herpetology21
- heteroatoms16
- heteroclite17
- heteroecism19
- heterogonic19
- heterograft18
- heterolytic19
- heterophile19
- heteroploid18
- heterospory18
- heterotopic19
- heterotroph18
- heterotypic21
- hierarchies18
- hieroglyphs23
- hierophants19
- hippocrases22
- holographed22
- holographer21
- holographic24
- homeopathic24
- homeostatic19
- homestretch21
- homographic26
- homologates19
- homoplastic23
- horological20
- horologists16
- horseplayer19
- hypercharge25
- hyperphagic28
- hyperstatic21
- hypogastric23
- hypoplastic25
- hypothecate23
- incorporate18
- incorporeal19
- integrators14
- intercepter18
- interceptor18
- intercooler16
- intercostal16
- interlopers16
- interpolate16
- interrelate13
- interrogate14
- interrogees14
- interschool18
- laparoscope21
- latchstring20
- leafhoppers23
- lectureship21
- legateships19
- lepidoptera19
- leptospiral19
- leptospires18
- letterheads15
- letterpress15
- letterspace18
- lighterages18
- literatures13
- lithographs21
- lithography23
- lithophanes20
- lithophytes21
- lithosphere19
- logographic24
- logomachies22
- lophophores22
- luteotropic19
- masterpiece20
- meliorators15
- meritocrats17
- mesopelagic23
- mesotrophic22
- metrologies17
- metrologist17
- micrographs24
- microphages24
- microsphere22
- morphologic25
- necrologies18
- necrologist18
- necropoleis19
- negotiators14
- northeaster14
- northerlies15
- obliterates15
- obliterator15
- obstetrical18
- octapeptide21
- oligarchies19
- oligochaete19
- optometries17
- orchestrate16
- ornithopter17
- orographies18
- orthocenter17
- orthoclases17
- orthoepists16
- orthography22
- orthopaedic20
- orthopedics20
- orthopedist17
- orthopteran17
- orthoscopic22
- orthostatic16
- osteologies14
- osteologist14
- osteopathic19
- otherwhiles19
- outpreaches20
- overcharges22
- overoperate18
- overpeoples22
- overprecise21
- overprotect21
- overreaches20
- overstretch20
- pacesetters17
- pacesetting20
- pamphleteer23
- paperweight24
- paraplegics23
- parenthetic20
- paresthetic19
- participles21
- partnership20
- patchoulies21
- paternoster15
- pathologies19
- pathologist19
- pearlescent19
- peashooters16
- pentarchies20
- peoplehoods21
- percentages20
- percentiles19
- perceptible24
- perceptions21
- perchlorate20
- percolating21
- percolation19
- percolators18
- peregrinate17
- perestroika18
- peripatetic20
- peripeteias17
- peripherals20
- peripheries19
- periphrases19
- peristaltic18
- perithecial20
- perorations15
- perpetrated18
- perpetrates17
- perpetrator17
- perpetuates18
- perpetuator18
- perspective24
- petroglyphs24
- petrography23
- petrologies17
- petrologist17
- phagocytose23
- phenocopies23
- phenologies20