9 letters
- lineation12
- machinate18
- machining21
- machinist18
- macintosh18
- maintains14
- malachite18
- malathion16
- manganate16
- manganite16
- manhattan16
- manicotti16
- manticore16
- manzanita23
- masticate15
- mechanism21
- mechanist18
- mediation14
- melanitic17
- melanotic17
- melatonin15
- mendicant18
- mentation14
- metonymic21
- miasmatic18
- militance17
- mincemeat19
- ministate13
- minuteman18
- mitogenic18
- mitomycin21
- mnemonics20
- monachism21
- monatomic19
- monoamine17
- monomania17
- monteiths15
- mortician16
- natations11
- natatoria10
- naumachia19
- negotiant13
- neolithic16
- nicotiana14
- nicotines14
- nictating16
- nictitate13
- nighttime17
- ninetieth13
- nitration11
- nominated15
- nominates14
- nonacting17
- nonaction15
- nonanimal16
- nonatomic17
- nonentity14
- nonethnic17
- nonextant19
- nonfinite15
- nonimmune19
- nonimpact20
- noninsect15
- nonmental16
- nonmetric17
- nonmutant16
- nonnative16
- nontheist13
- novitiate14
- oceanaria13
- ointments14
- ommatidia16
- onanistic14
- ornithine13
- panettoni14
- pantomime19
- poinciana17
- satiation10
- semitonic16
- staminate13
- stanchion16
- stemmatic18
- stonechat15
- taconites13
- tactician16
- tanzanite20
- tarnation11
- tectonism16
- tenanting14
- thematics17
- thiamines15
- thionates12
- thionines13
- timothies14
- tithonias12
- trenchant16
- tretinoin11
- triatomic15
- trichinae15
- tricotine13
- uintahite13