13 letters
- interproximal28
- intersexually26
- intoxicatedly28
- intoxications25
- isoalloxazine32
- isocarboxazid36
- juxtaposition34
- letterboxings27
- lexicographer31
- lexicographic34
- lexicologists27
- luxuriousness25
- maxillofacial32
- maximizations36
- methotrexates25
- methoxychlors33
- nasopharynxes29
- neurotoxicity27
- nonexecutives30
- nonexistences26
- nonexpendable31
- nonexploitive30
- nonexplosives30
- nonhomosexual29
- nonintoxicant27
- noxiousnesses23
- obnoxiousness26
- ototoxicities23
- overanxieties25
- overexercised28
- overexercises27
- overexertions25
- overexpanding32
- overexpansion29
- overexplained30
- overexploited29
- overexposures28
- overextending29
- overextension26
- overexuberant29
- overtaxations25
- oxaloacetates24
- oxyhemoglobin34
- paradoxically31
- paramyxovirus33
- parasexuality27
- photooxidized36
- photooxidizes35
- phototoxicity30
- phytotoxicity32
- praxeological30
- preexistences27
- preexperiment30
- propoxyphenes34
- protogalaxies26
- proximateness27
- pyridoxamines30
- reannexations23
- reexamination25
- reexperienced28
- reexperiences27
- reexportation24
- reflexiveness29
- reflexivities28
- reflexologies27
- relaxednesses23
- retroflexions25
- sexagenarians24
- sexdecillions27
- sexlessnesses22
- sexploitation25
- sextuplicated29
- sextuplicates28
- sexualization32
- superluxuries27
- taxonomically31
- tetrodotoxins22
- toxicological30
- toxicologists26
- toxoplasmoses27
- toxoplasmosis27
- triaxialities21
- tricarboxylic32
- ultraorthodox25
- underexposing29
- underexposure27
- unexceptional30
- unexplainable31
- unorthodoxies25
- vexatiousness26
- vexillologies29
- vexillologist29
- xenodiagnoses25
- xenodiagnosis25
- xerophthalmia31
- xerophthalmic34
- xylographical34
- zooxanthellae34