edit; for context, you can check my journal. i just wanted to ask a question of people who experience menstruation, and not all women menstruate(for various reasons), and some transmen do, so saying 'women' didn't really work for me. and of course it didn't matter if they were menstruating at the moment. i was curious if there was a rule, like one of those greek root/greek suffix things i guess.
thanks for all the responses. i kind of like menstruant as a word. but spellcheck doesn't like it either! and i think it does sound more of an adjective, though i like the word truant being in there.
and if you don't want to click through, i used menstruator in my journal because it looked better.