This paper presents a first attempt to formally characterize the prosodic properties of Spanish acronyms. Based on the examination of a dataset and the results of a written questionnaire and perception test administered to native speakers, the stress patterns and prosodic size of Spanish acronyms are investigated. We show that stress in acronyms follows the regular stress patterns of the language. We further claim that acronyms are restricted to an upper limit of three syllables, which we explain by resorting to layered feet. Additionally, we show that an interesting minimality requirement applies exclusively to acronyms, one that must be expressed not in terms of syllable weight, but rather in terms of the number of segments.

In Modern Hebrew, some, but not all, nominals exhibit obligatory /a/-syncope in open syllables if they are antepretonic in a simple (nominal) word. The same vowels optionally syncopate in any pretonic syllable in non-final members of compounds. Here we first show that syncope in compounds fills a gap in the typology of weak positions. We then propose a formal analysis in Gradient Harmonic Grammar (Smolensky and Goldrick 2016), which distinguishes between a weak /a/ and a strong /a/. Only the former undergoes syncope in both configurations; and only in non-compounds is it protected by a positional faithfulness constraint referencing the head foot of the prosodic word. Optionality in compounds is shown to follow from Base-Derivative faithfulness.