I don't recommend the use of nonsense words in practice other than introducing a few games similar to the Year One phonics check a week or two before the phonics check to familiarise the children with its format. Otherwise, it is surely far better to use a cumulative bank of real words for routine phonics practice for children to enable additional vocabulary enrichment as part of the phonics provision.
https://ukedchat.com/2018/05/25/ukedpodcast-22-phonics/
The @UKEdPodcast – Episode 22 – Phonics Pruning and Thriving with @debbiehepp @JohnStanier1 & @MartineGuernsey
Hosted by @digicoled, in this episode we explore the Phonics teaching and learning strategy in England with an in-depth, fascinating interview with Debbie Hepplewhite MBE. You can view the printable Alphabetic Code Charts mentioned at http://www.alphabeticcodecharts.com/free_charts.html along with her latest free chart with audio throughout at https://syntheticphonics.com/the-englis ... ith-audio/