# What is a Symbiotic Word™?

This is in the spirit of the What is a Word™/Phrase™ series started by JLee with a special brand of Phrase™ and Word™ puzzles.

If a word conforms to a special rule, I call it a Symbiotic Word™.

Use the examples below to find the rule.

$$\begin{array}{|c|c|}\hline \bbox[yellow]{\textbf{Symbiotic Words™}} & \bbox[yellow]{\textbf{Not Symbiotic Words™}}\\\hline \text{GOOGOL} & \text{THOUSAND}\\\hline \text{POKEMON} & \text{NINTENDO}\\\hline \text{ANIMAL} & \text{HUMAN}\\\hline \text{DESK} & \text{TABLE}\\\hline \text{TEXTURE} & \text{MATERIAL}\\\hline \text{DEPENDENT} & \text{INDEPENDENT}\\\hline \text{EMPIRE} & \text{KINGDOM}\\\hline \text{DEFENSE} & \text{OFFENSE}\\\hline \text{SERIES} & \text{PARALLEL}\\\hline \text{FAMILIAR} & \text{UNFAMILIAR}\\\hline \end{array}$$

CSV Version:

Symbiotic Words™,Not Symbiotic Words™
GOOGOL,THOUSAND
POKEMON,NINTENDO
ANIMAL,HUMAN
DESK,TABLE
TEXTURE,MATERIAL
DEPENDENT,INDEPENDENT
EMPIRE,KINGDOM
DEFENSE,OFFENSE
SERIES,PARALLEL
FAMILIAR,UNFAMILIAR


These are not the only examples of Symbiotic Words™, many more exist.

A word is Symbiotic™ if it

has one or more vowels,

and

taken as a sequence, the vowels form a palindrome.

For example, REIFIED is Symbiotic™

because the vowels are EIIE, a palindrome,

while REIFY is not,

because the vowels are EI, which is not a palindrome.

The words are called Symbiotic™ because

the vowels in SYMBIOTIC, IOI, form a palindrome of the kind indicated.

• Correct! Great job! – Oliver Ni Dec 14 '16 at 2:34