Inflectional Morphology (definition)
From Scottish Gaelic Grammar Wiki
In English, inflectional morphology changes a word’s number or tense, but not its syntactic category. For example, with pushed, the added –ed affix is an inflectional morpheme which makes the word "push" past tense, unlike the word player- where the affix –er is a derivational morpheme which changes the verb play- into the noun player.
