Countable Nouns That Start with TR and End with ID

Explore 20 verified English countable nouns starting with TR and ending with ID, including Trapezoid, Tricuspid, Triffid, Triploid, Trendoid, Triterpenoid and Tracheid. 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
trapezoid
tracheid
tragulid
Starts with TRE
2 words
trendoid
trematoid
Starts with TRI
11 words
tricuspid
triffid
triploid
triterpenoid
trihybrid
triacid
triakid
trichostrongylid
trionychid
triakisoctahedrid
trionychoideachid
Starts with TRO
4 words
trochoid
troodontid
trochilid
trombiculid

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