Inconsistency between different item names

The items, ''Clay Ball'' and ''Slimeball'' are inconsistenly named. They should either both be named ''Clay Ball'' and ''Slime Ball'', or ''Clayball'' and Slimeball''. There may also be other items affected by this inconsistency, but so far I am unaware. NOT a dupe of MC-124190 (my other report, MC-213248, got denied for that).