<unk>  is a type of fluent aphasia in which an individual's speech is incomprehensible, but appears to make sense to the individual. Persons experiencing this condition will either replace a desired word with another that sounds or looks like the original one, or has some other connection to it, or they will replace it with random sounds. Accordingly, persons with<unk>  often use neologisms, and may perseverate if they try to replace the words they can not find with sounds.
Jargon aphasia
Global aphasia
Conduction aphasia
Transcortical motor aphasia
Mixed transcortical aphasia
Expressive aphasia
Logopenic progressive aphasia
Anomic aphasia