This paper focusses on verb-based nominalization in Harakmbut (isolate, Peru), which falls into two formal types on the basis of the prefix used. The first type, using the nominalizing prefix wa(ʔ)-, is restricted to participant nominalization and is predominantly used to produce nouns for NP-use. The second type, using the nominalizing prefix e(ʔ)-, is mainly used for event nominalization and typically produces multi-word nominalizations. Depending on the constructions they occur in and additional suffixation they take, nominalizations with e(ʔ)- can serve complementation as well as adverbial functions. Across the two formal types, multi-word nominalizations combine NP-like external syntax with verb-like internal syntax. The two nominalizing prefixes also serve a basic function in noun-based nominalization, lending independent status to obligatorily bound nouns.