There are no energy words that start with the letter Z.
A five (5) letter word that starts with Z and ends with F, there is none recorded. However, there is a word that starts with Z and ends with F. The word is a four (4) letter word: zarf, (noun) a metal holder for a coffee cup.
Zealous is a positive word. It starts with the letter z.
5 letter words that start with Z: zealot
Zeal
Zebra
Zero
zoozitzipzapzen
Zoology
· Zinnia
· zealous
An abstract noun that starts with Z is zeal, a word for great energy or enthusiasm in pursuit of a cause or an objective.
Nuclear