# spectra vs spectrum

> English confusable word pair

## The two words

### spectra
*noun · IPA /ˈspɛktɹə/ · frequency rank #21,073*
plural of spectrum

### spectrum
*noun · IPA /ˈspɛktɹəm/ · frequency rank #4,634*
A range; a continuous, infinite, one-dimensional set, possibly bounded by extremes.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/vs/spectra-vs-spectrum