Synonyms for filter in Free Thesaurus. Antonyms for filter. 41 synonyms for filter: purify, treat, strain, refine, riddle, sift, sieve, winnow, filtrate, screen, trickle, leach, seep, percolate, well, escape, leak.... What are synonyms for filter?
What It Could Also Be: Though you should always take a late period seriously if you've been engaging in any activity that could possibly get you pregnant, there are several things that can cause late periods besides pregnancy.
There are other causes of irregular periods including hormones, stress, STIs (sexually transmitted infections) and pregnancy. If you think a STI or pregnancy could be the cause of your irregular period, head to the doctor as soon as you can.