Antonyms of adj 100th

1 sense of 100th

Sense 1
hundredth, centesimal, 100th -- (the ordinal number of one hundred in counting order)

INDIRECT (VIA ordinal) -> cardinal -- (being or denoting a numerical quantity but not order; "cardinal numbers")

Similarity of adj 100th

1 sense of 100th

Sense 1
hundredth, centesimal, 100th -- (the ordinal number of one hundred in counting order)
       => ordinal (vs. cardinal) -- (being or denoting a numerical order in a series; "ordinal numbers"; "held an ordinal rank of seventh")

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