This question already has an answer here:
When I put two plural nouns in a row, should I use plural form for both? Often, when I do so, it seems wrong.
Examples can be:
"components reliabilities" - referring to reliabilities of many different components "components failures" - failures of components "systems designers" - designers who creates systems
Another example popped up, as I am writing this question:
"words combinations" - combinations of words
I face this problem, since I am trying to write to cover general cases, without being specific. Also, I know that I could change the word order with 'of' in many cases (e.g. failures of components). But, sometimes, such modification doesn't fit well in a sentence. So, I decided to ask.
Any help would be appreciated.