11 letters
- gradational16
- gradiometer17
- granolithic20
- granophyric24
- graphically25
- graphitized28
- grapholects22
- hagioscopic24
- halogenated18
- haloperidol19
- haplologies20
- hectoringly22
- hedonically22
- helicopters20
- helicopting23
- heliometric20
- heliotropes17
- heliotropic20
- hematologic22
- hemopoietic22
- heretically20
- herpetology21
- heterocycle22
- heterogonic19
- heterokarya19
- heterolytic19
- heteroploid18
- heterospory18
- heterotopic19
- heterotypic21
- holographed22
- holographer21
- holographic24
- homicidally24
- homiletical21
- horological20
- horseplayer19
- hydrogenate19
- hydrologies19
- hydrologist19
- hydrometeor19
- hydrometric22
- hydropathic24
- hydrophilic25
- hydrotropic22
- hygrometric23
- hygroscopic26
- hyperactive25
- hyperboloid23
- hypercharge25
- hypercritic24
- hypermetric24
- hypocentral23
- hypocycloid28
- hypogastric23
- iconography24
- icosahedral18
- identically20
- ideographic22
- ideological19
- idiographic22
- idiotically19
- illegalized26
- illogically22
- impartially21
- impractical24
- imprecatory22
- incarcerate18
- incorporate18
- incorporeal19
- incorrectly21
- interallied15
- intercalary18
- intercooler16
- interplayed19
- interracial16
- ipsilateral16
- ironhearted15
- irradiators12
- irradicable19
- irradicably21
- irregularly18
- irreparable18
- irreparably20
- isoelectric18
- ithyphallic25
- kilocalorie20
- labradorite16
- laccolithic24
- lachrymator22
- laconically23
- lamplighter23
- lateralized23
- lateralling17
- leatherwood18
- legendarily19
- lepidolites17
- lepidoptera19
- lichenology23
- limelighted21
- lionhearted16
- literalized23
- lithography23
- lithologies17
- loculicidal22
- logarithmic22
- logographic24
- lycanthrope23
- lyophilised21
- lyophilized30
- lyophilizer29
- macrophagic27
- macrophytic27
- madreporite18
- maladroitly19
- malariology20
- maledictory21
- malpractice24
- matriarchal20
- medicolegal22
- meiotically21
- melodically23
- meritocracy22
- metalloidal18
- meteoroidal16
- microreader18
- motorcycled24
- motorically21
- mycological26
- myelopathic25
- myoelectric23
- narcoleptic22
- narratology17
- necrophilia21
- necrophilic24
- neocortical19
- occipitally24
- ochlocratic23
- octagonally21
- oligarchies19
- oligochaete19
- oneirically19
- operability20
- operational16
- operatively21
- operculated20
- oracularity18
- organically21
- orographies18
- orthography22
- orthopaedic20
- orthopedics20
- oscillatory18
- outpreached21
- overcharged23
- overchilled23
- overcoached24
- overcorrect21
- overlighted21
- overliteral17
- pacifically27
- pacificator23
- paediatrics18
- palatalized26
- paleography24
- palynologic24
- panegyrical23
- paradisical19
- paradoxical26
- paragenetic20
- paragraphed22
- paragrapher21
- paragraphic24
- paraldehyde21
- parallactic22
- paralleling20
- parallelled19
- paramedical22
- parasitical18
- parathyroid19
- paratrooper17
- paratyphoid22
- parfocality23
- parochially23
- pathologies19
- patriarchal20
- patrilineal17
- peccadillos23
- peculiarity21
- pedagogical23
- pedicellate20
- pedological22
- pedophiliac24
- pellitories16
- penicillate20
- penological22
- pentahedral19
- perchlorate20
- percolating21
- percolation19