From Vicenarian to Octogenarian (from 20yo to 80 yo)

 There are specific terms in English for people in different 10-year age ranges (based on Latin roots).

Here’s the breakdown:

• 20–29 years old → Vicenarian

• 30–39 years old → Tricenarian

• 40–49 years old → Quadragenarian

• 50–59 years old → Quinquagenarian

• 60–69 years old → Sexagenarian

• 70–79 years old → Septuagenarian

• 80–89 years old → Octogenarian

• 90–99 years old → Nonagenarian

• 100–109 years old → Centenarian

• 110+ years old → Supercentenarian

So specifically for your question:

• 20 y.o. → Vicenarian

• 30 y.o. → Tricenarian

• 40 y.o. → Quadragenarian

• 50 y.o. → Quinquagenarian

• 60 y.o. → Sexagenarian

• 70 y.o. → Septuagenarian

• 80 y.o. → Octogenarian 

• 90 y.o. → Nonagenarian

• 100 y.o. → Centenarian