All words: MRC Psycholinguistic Database
Word pairs: https://wordnorms.com/
Nonwords: ARC Nonword Database
When designing your PsychoPy experiment, it is important to consider confounding factors associated with word stimuli. This is executed at the design and planning stage and in the method section, you are required to provide a concise but thorough explanation of the word stimuli selection process.
The method section plays a vital role in the development of the whole assessment, and working on it during class offers the advantage of receiving support from your tutor and peers.