Help me with a SYNONYMOUS keywords! (actually two keywords cuz the're synonyms :P)

How does Google SERPs react on synonymous (words with the same or similar meaning) keywords? I cant expose the keyword I am referring to for obvious reasons
but I'll try to describe it as best as I can. It's a product which can be called with with two different words meaning the exact same
thing (the product). In spoken language one of the words (the correct and nicer word) is more used when talking about a "non commercial" version of the product whilst the other word (English-made and ugly word) is used to describe the "commercial" version of it.

The longtail keywords I researched for this niche are almost identical with both the words and google, ebay and amazon are
showing the same exact rankings when searching for both of them separately, as in fact the words mean the same thing.

I'm going for this niche but cant decide which word use for my mine keyword and EMD.
Could this hurt my rankings or even make it impossible to rank?
Or will rank for both the keywords if I prevalently optimize one of them?


Obviously I'm a nob so experienced guys helppp please!!

You'll want to rank for one of them as your focus keyword and use the other one as a latent semantic indexing (LSI) keyword by including it in the same article. These LSI keywords help Google and other search engines determine what your page is about (e.g., Apple the brand or Apple the fruit). You also have the potential to rank for both of them since they're synonyms, although you'll rank better for the keyword that you targeted. As for which one you should target, you'll need to conduct keyword research to find out which keyword has less exact match results and create a competitive analysis report to determine which keyword would be easier to rank while still providing decent traffic. In the event that the keywords are mostly identical in terms of competition, choose the keyword that receives the most searches each month.

thanks
I read the tutorials you linked and looks like the kw isn't as good as I thought so I'll keep on searching!