OXFORD DICTIONARY
Than, conj.
1 introducing the second element in a comparison (you are older than he is; you are older than he).
It is also possible to say you are older than him, with than treated as a preposition, esp. in less formal contexts.
2 introducing the second element in a statement of difference (anyone other than me).
OE thanne etc., orig. the same word as THEN
THESAURUS
Than
alias, as compared with, aside from, bar, barring, beside, besides, by comparison with, compared with, contrarily, else, elsewise, ex, except, except for, excepting, excluding, exclusive of, in comparison with, in other respects, in other ways, leaving out, let alone, omitting, or else, other than, otherwise, outside of, over against, precluding, save, save and except, saving, taken with, unless, without