Your sentence
aussi+riche+que+lui
Words in this sentence
que
that (introduces a subordinate noun clause and connects it to its parent clause); Substitutes for another, previously stated conjunction.; when, no sooner; Links two noun phrases in apposition forming a clause without a (finite) verb, such that the complement acts as predicate.; introduces a comparison; than; as; only, just; but, nothing but; how (in rhetorical interjections)
Conjunction
lui
him, he, it; the third-person masculine singular personal pronoun used after a preposition, or as the predicate of a linking verb, or when disjoined from a sentence, or as a stressed subject; him, her; the third-person singular personal pronoun used as an indirect object
Pronoun