| Term | Definition |
| What should count as a word and what shouldn't? | Words |
| a specific word form with a specific meaning or function (wrote, sang) (written, sung) | grammatical word |
| a form which is the starting point for a morphological process | base |
| a base which has no identifiable sub-parts | root |
| fully specified form; the place where morphology meets syntax | word-forms |
| the stringing together of word-forms | syntax |
| No, for example it's not clear where clitics fit in: I'll is one phonlogical unit but two semantic and syntactic units (I + will) | Are there clear lines between morphology and syntax? |
| meanings of simple and complex words are often unpredictable, so it is difficult to claim a one to one mapping between words and their subparts | Morphological problem no.2 |
| Keeping semantics separate is disconfirmed by words that are 100 percent predictable by the meanings of their parts | Morphological problem no. 3 |
| Semantics cannot account for idioms, meanings not predictable from their parts, clearly larger than words according to phonological and syntactic criteria | Morphological problem no. 4 |