I'm here trying to learn a better term for the type of suffix I seem to have made. I'm writing a grammar, so I'd like the term to seem right to folks like you.
Like compound word modifiers--e.g., fire modifies the head man for the new compound word fireman: a sort of man--for fires!--my set of suffixes are real words that make new sorts of words. However the odd thing is that these 8 words do this way more often than any other words. Other words can also compound; these 8 are the go-to.
Being a small group very commonly used for making new words, they're like derivational suffixes (-er, -ish, and some of their friends). However, I think that by definition derivational suffixes are not also standalone words with the same meanings.
The 8 suffixes form two groups of contrasting concepts. Well, okay, common word-endings that distinguish related words by repeating certain contrasts. Sounds like gender. Could they be noun classes like gender? I don't think so: they don't prompt agreement from other words (la amiga mexicana); and they're common across all parts of speech but technically most words lack them.
Well, I don't know what to call them. What do you want to call them?
I'm happy to show the 8 suffixes if it helps. I wanted first to avoid an intimidating-length for the post. Thank you for your time.