Is there a single word for "Parts of Speech"?

Is there a word that refers to the different forms of a word, or a word’s following four parts of speech—verb, adverb, noun, adjective?

For example:

confuse verb
confusedly adverb
confusion noun
confused, confusing, & confusable adjective

What word should be inserted if I wanted to say:
"I’m looking for all the [forms/parts of speech] of confuse."
or
"I want to use a [form/part of speech] of startle that is not in the dictionary; bestartlement, for example."

I think the answer to my question might be here Word form dictionary/system/tool, but I couldn’t understand the descriptions of Inflection and Conjugation well enough to be certain that either is the word I am looking for.

EDIT:
After reading through the links on declensions and derivational morphology provided by Benjamin Harman and John Lawler respectively, I agree with Lawler that declensions are not what I am talking about. I think I want to refer to the set of any given content word’s semantically associated parts of speech, i.e. all the various derivational morpheme altered forms of a given content word (and sometimes to just one of a content word’s corresponding forms in a different lexical category).
All these terms are new to me, so I apologize if I used any of them incorrectly.