18-letter words containing h, e, l, m, i, n
- the magnolia state — a nickname referring to Mississippi
- the masurian lakes — a group of lakes in Masuria in NE Poland: scene of Russian defeats by the Germans (1914, 1915) during World War I
- thermal efficiency — the ratio of the work output of a heat engine to the heat input expressed in the same units of energy.
- thermoluminescence — phosphorescence produced by the heating of a substance.
- thomas alva edison — Thomas Alva [al-vuh] /ˈæl və/ (Show IPA), 1847–1931, U.S. inventor, especially of electrical devices.
- triarylmethane dye — any of the class of dyes containing three aryl groups attached to a central carbon atom: used chiefly for dyeing cotton, wool, and silk.
- vermilion rockfish — a scarlet-red rockfish, Sebastes miniatus, inhabiting waters along the Pacific coast of North America, important as a food fish.
- vitamin a aldehyde — retinal2 .
- wesleyan methodist — a member of any of the churches founded on the evangelical principles of John Wesley.
- widemouth blindcat — any of several catfishes, as Satan eurystomus (widemouth blindcat) of Texas, that inhabit underground streams and have undeveloped eyes and unpigmented skin.