phosphorescence / phosphorescents are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
phosphorescence: (noun) a fluorescence that persists after the bombarding radiation has ceased.
phosphorescents: NA
phosphorescence: f·AA·s·f·er·EH·s·ah·n·s
phosphorescents: NA
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)