Lethologica
Lethologica is the state of not being able to summon a word you know you know — and it has almost no lexicographic standing at all.
Full definition of Lethologica →:: COMPARE ::
LethologicavsAnomia
The short answer
Anomia is a documented clinical word-retrieval deficit with a research literature behind it. Lethologica is a well-formed Greek compound that the people who actually study the phenomenon never adopted — which is the clearest possible signal about its standing.
Side by side
| Aspect | Lethologica | Anomia |
|---|---|---|
| In major dictionaries | Barely | Yes |
| Clinical literature | None | Substantial |
| Used by researchers | No | Yes |
| Greek form | Correct | Correct |
What each one means
Anomia
The contrast above sets out how Anomia differs from Lethologica on the points that actually matter.