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 

ilka

*as much as, as great as

The correlative ᴹQ. ilka appeared in Demonstrative, Relative, and Correlative Stems (DRC) from 1948 (PE23/111), a combination of the relative pronoun ᴹQ. i and ᴹQ. -lka “much”.

Neo-Quenya: For purposes of Neo-Quenya I would update this to ᴺQ. yalca “as much as” using the relative pronoun ya more commonly used in declined forms in later writings, such as Q. yassë “where [relative]”.