There are many named concepts which relate to verbs across many languages.
The three most well known would be tense, aspect, and mood. But person, number, and voice are others, and there must be many more.
But should I call these "properties" of a verb, "charecteristics", "features", "categories"? Is there one term which is mostly used as a cover term for these and other verbal concepts when considered as a whole?
Just to be clear, I'm not talking about the terms "TAM" or "screeve" which are used to describe verb inflections that result from the interaction of say tense and mood. I'm talking about what word to use in the sentence "Aspect and mood are two XXX's of verbs". What term belongs in the place of XXX?
It's also possible that the same term might apply to concepts encoded in other parts of speech. For instance "Number and case are two YYY's of nouns"...