There is "Random item" link in menu on the left of Wikidata. There would be great if there could be "Random lexeme" link too.
Community consensus discussion was at https://www.wikidata.org/wiki/Wikidata:Project_chat/Archive/2019/08#Random_lexeme_to_the_sidebar ; not sure what the outcome was. Reopening as tasks shouldn't be stalled for too long without a clear reason.
Now that there is a dedicated section for lexic. data in the Wikidata sidebar, I was bold and added the link there: https://www.wikidata.org/w/index.php?title=MediaWiki:Sidebar&curid=112&diff=1304772560&oldid=1297734550 Hopefully, the caches will expire and it will soon be visible.