Yes, it is a noun. It is a plural noun meaning products made as a result (other than the main one) of a process.
There is no specific collective noun for 'products', however a noun suitable for the situation can be used; for example a line of products, a display of products, a catelog of products, etc.
Product is a noun.
NOUN
products
Yes the word leather is a noun. It is an uncountable noun.
No, ice cap is a common noun. It is only a proper noun if it is the name of something specific, such as Ice Cap, Alaska or Ice Cap Products.
Yes the word inventors is a noun. It is the plural of inventor.
Yes, Chevrolet is a the name of a specific company and its products.
That is the correct spelling of the plural noun "products" (items, goods).
Innovation is a noun, referring to the process or result of introducing new ideas, methods, or products. It is not typically used as a verb.
Yes, "American-made" should be hyphenated when used as a compound adjective before a noun. For example, you would write "American-made products." However, if it follows the noun, it does not need to be hyphenated, as in "These products are American made."
The likely word is the plural noun multiples (integer products of an integer).