This research analyses the syllables and stress placement in Uzbek nouns and adjectives. Syllables in Uzbek are divided into heavy and light to explain quantity-sensitivity in stress placement: Heavy syllables tend to attract stress. Previous studies argued that in Uzbek, stress docks on the final syllable except for loan words. However, this rule encounters exceptions. Hence, we have come up with new stress rules. Uzbek nouns and adjectives are stressed on the rightmost heavy syllable which is usually, but not always, a final syllable. In addition, if words do not contain any heavy syllables, then stress falls on the final light syllable. Furthermore, with the morpho-phonologically made superlative degree adjectives, stress falls on the word-initial heavy syllable. Finally, we will make a three-way comparison between the Uzbek stress system, the English stress system, and the North Kyungsang Korean tonal system, identifying the similarities and differences among them.