Countable Nouns Starting with AR and Containing UM

This list gathers 13 English countable nouns starting with AR and containing UM, such as Argument, Argumentation, Arboretum, Arum, Arcanum, Armamentarium and Argumentum. Use the sorting controls below to organize entries by length, or consult our noun grammar guide to review singular and plural count rules.

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Starts with ARB
2 words
arboretum
arbitrium
Starts with ARC5 words
arcanum
archegonium
archaebacterium
arctium
archesporium
Starts with ARG4 words
argument
argumentation
argumentum
argyranthemum
Starts with ARM
1 words
armamentarium
Starts with ARU
1 words
arum

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