Alluaivite is a very specific mineral term that refers to a rare, yellowish mineral found in alkaline intrusions and dikes. As such, there are few synonyms for this mineral. However, there are related minerals that might be considered similar, including eudialyte, loparite, and xenotime. Eudialyte is a pink or red mineral that's found in some of the same locations as alluaivite. Loparite is a rare-earth element ore that's also found in alkaline rocks. Xenotime is a yellow or brown mineral that's found in granites or rare-earth-rich carbonatites. While they may not be exact synonyms, these minerals are related and may be of interest to those studying rare earth elements and minerals.