I know it happens with 懐かしい/なつい and 難しい/むずい, but can it apply to other words? For example 恥ずかしい/はずい
I don't know if it's a thing with all words ending with かしい, but it apparently exists for this>恥ずかしい/はずいhttps://www.weblio.jp/content/%E6%81%A5%E3%81%9A%E3%81%84