Countable Nouns That Start with TR and End with IUM

Explore 12 verified English countable nouns starting with TR and ending with IUM, including Trapezium, Trillium, Trivium, Triennium, Transuranium, Triclinium and Triforium. Sort these count nouns with singular and plural forms by word length for ESL grammar practice, determiner usage, and plural spelling below, or review singular and plural count rules in our noun grammar guide.

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Starts with TRA
3 words
trapezium
transuranium
trachelium
Starts with TRI
9 words
trillium
trivium
triennium
triclinium
triforium
trifolium
tripudium
tridominium
trichosporangium

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