The word "twentyones" can be substituted with synonyms such as "twenty-firsts" or "21sts". Other alternatives include "twenty-one occasions", "twenty-one instances", or simply "twenty-one times". Additionally, the term "twenty-one meetings" or "twenty-one get-togethers" can be used to refer to a group of individuals meeting 21 times. Furthermore, "twenty-one occurrences" or "twenty-one happenings" can also be used to convey the meaning of something that has occurred 21 times. Regardless of the situation, there are various synonyms that can be employed to replace the word "twentyones".