than

—used as a function word to indicate the second member or the member taken as the point of departure in a comparison expressive of inequality—used with comparative adjectives and comparative adverbs

—used as a function word to indicate difference of kind, manner, or identity—used especially with some adjectives and adverbs that express diversity

rather than —usually used only after prefer, preferable, and preferably

in comparison with

of greater weight than the air displaced