No one wants your lyric to sound like you swallowed a thesaurus. Stop working on your idea entirely. The tools are designed to be cool and entertain, but also help aspiring writers create a range of different media, including plots, lyrics for songs, poems, letters and names.
The absolute worst case scenario is that you hold a truly awful piece of writing in your hands; but you have a vast wealth of words, images, memories, stories, and rhymes waiting to be summoned to help you work through your lyric, to build your first draft into a second, third, or fourth draft which is incredible.
Here are five of the best practices to get you writing better lyrics today. Pay close attention to what it is that you enjoy, and practice writing poems of the same type — and then, apply these same influences to lyrics. A lyric might exist first on a page or screen, but only so that a real-life person can perform it.
You might also consider setting certain poems to music, which can also be a good exercise in really digesting how words and music join together.
Try to understand how and why the lyric works. Think about their structure.
Why not make up your own language or words for music? Instead, take this time to rest: go to sleep, or take a long walk, or read a book. Keep listening.