Countable Nouns That Start with TR and End with UM

Explore 21 verified English countable nouns starting with TR and ending with UM, including Trapezium, Trillium, Trivium, Triduum, Triennium, Transuranium and Tropaeolum. 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
5 words
trapezium
transuranium
trachelium
trachelospermum
trankum
Starts with TRI
15 words
trillium
trivium
triduum
triennium
triticum
triclinium
triforium
trifolium
triquetrum
tripleurospermum
tripudium
tridominium
tritocerebrum
trinkum
trichosporangium
Starts with TRO
1 words
tropaeolum

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