Rap is about rhyming. Period. If you can't string together several strong rhymes, you cannot be a rapper. Positive, there are plenty of rappers who have turn into quasi renowned on significantly less than stellar rhyming capabilities, but these guys get little respect or achievement. The best rappers available (Jay-Z, Eminem, Tupac, 50 Cent, etc.) all have killer rhyming expertise.
Thus, when aspiring rappers talk about receiving rap dictionaries to make rhyming a little "easier", I naturally balk. A rap dictionary is actually 'cheating' in my book. It kills the really soul from the music. It says, "I have no skills or interest in working difficult to be a rapper. I just want a fast repair option that will make me semi-famous". Such a hack mentality can not take you really far inside the rap game.
Of course, I'm not saying that you just will need not seek the advice of a dictionary at all. A strong vocabulary is, following all, a cornerstone of rap. But for that, I would really advise a typical dictionary over a rap dictionary. That is for the purpose pointed out above, and because rap dictionaries tend to be quite genre particular and lack the killer words that may make or break a song.
Most importantly, should you adhere to the rap dictionary as well closely, you are going to start sounding like the hundreds of other rappers who took the assistance of the dictionary. In place of sounding original and fresh, you'll sound like another soldier in an army of rapping clones. Surely you don't want such a reputation to become linked with you or your art.
The most effective rhymes involve words that happen to be complex and are certainly not typically located in most rap dictionaries. Longer words with extra syllables make for terrific rhymes, but are unfortunately missing in such dictionaries.
Try this out: pick up a dictionary (a common a single) and create down a dozen words you may have by no means even heard before, let alone know the meaning of. Be sure that they are several syllable words like "megalomaniac" or "metamorphosis". Try to discover ryhmes for these words and involve them inside your song. You'll be surprised how the inclusion of a few such words can make your song stand out entirely.