So, Yorùbà is a tonal language, ok. It is *not* monosyllabic, though. Not so OK :/

• igba ‘two hundred’
• igbá ‘calabash’
• ìgbà ‘time’
• ìgba ‘the season when perennial crops have the least production’
• ìgbá ‘garden egg’
• igbà ‘climbing rope’

• ọkọ ‘husband’
• ọkọ́ ‘hoe’
• ọ̀kọ̀ ‘spear’
• ọkọ̀ ‘vehicle’