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There are 14 words ending with ONTIUM

acontium — n. One of a series of threads of a septum of some actinians. — n. An Ancient Greek weapon similar to a javelin.
strontium — n. The metallic chemical element (symbol Sr) with an atomic number… — n. (Countable) A single atom of this element.
dracontium — n. (Pharmacy, obsolete) The roots and rhizomes of skunk cabbage…
distrontium — n. (Chemistry, especially in combination) Two strontium atoms in a molecule.
endodontium — n. (Dentistry) The complex of dentin and pulp in the centre of a tooth.
periodontium — n. The specialized tissues that both surround and support the…
Septimontium — prop.n. A festival celebrated by the inhabitants of the seven…
tristrontium — n. (Chemistry, in combination) Three atoms of strontium in a chemical compound.
nonastrontium — n. (Chemistry, in combination) Nine strontium atoms or cations…
pentastrontium — n. (Chemistry, in combination) Five strontium atoms or ions in…
radiostrontium — n. Any radioactive isotope of strontium, especially ⁹⁰₃₈Sr.
tetrastrontium — n. (Chemistry, in combination) Four atoms of strontium in a chemical compound.
organostrontium — adj. (Organic chemistry) Describing any organic compound containing…
rubidium-strontium — n. (Attributive) Designating a method of geological dating based…

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