Words matter.
Always use simple direct language.
- Help the poor
- Healthcare for everyone
- Good treatment at work.
Don't use complex words.
It is, though noting the term sexism itself hasn't been replaced with another that captures the distinction between biological sex and gender, at least one I know of. Gendered prejudice could be one, I guess.
We should be fighting it in a few directions:
"Women can do that too"
"Men can do that too"
"Women don't necessarily need to do that"
"Men don't necessarily need to do that"
"People who do not consider themselves men or women can do that too, and/or not do that."