Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!

Qenya 

aialli

a different number

The correlative ᴹQ. {waryalli >>} aialli “a different number” appeared in Demonstrative, Relative, and Correlative Stems (DRC) from 1948 (PE23/108 note #97), a combination of ᴹQ. aia- “other” and ᴹQ. -lli(ni) “number”.

Neo-Quenya: For purposes of Neo-Quenya I would update this to ᴺQ. hyalli(ni) “a different number” using later hya for “other”.