Claim: Categorization of speech errors falls into at least 18 types.
Evidence: A speech error, commonly referred to as a slip of the tongue (Latin: lapsus linguae, or occasionally self-demonstratingly, lipsus languae) or misspeaking, is a deviation (conscious or unconscious) from the apparently intended form of an utterance. Here is a collection of the main types: Addition Anticipation Blends Deletion Exchange Lexical selection error Malapropism, classical Metathesis Morpheme-exchange error Morpheme stranding Omission Perseveration Residual Speech Errors Shift Sound-exchange error Spoonerism Substitution Word-exchange error