How many syllables in eris?

There are 2 syllables in the word eris.

How to pronounce eris:

eris (noun):: a dwarf planet with a mean distance from the sun of 67 astronomical units (6.2 billion miles) and a diameter of 1500 miles (2400 kilometers)

Here are some other common 2-syllable words.

Syllable Fun Fact

Syllable contact laws govern the permissible combinations of consonants at syllable boundaries within and across words.

You, too, can become a syllable pro and wow your friends, family, and pets!