I think on most sororities' websites that are fraternities (confusing mouthfull) they usually either word it as "fraternity for women" or the imagery is feminine enough that people figure out it's not guys.
I know when I put APO on my resume, I always write out "Alpha Phi Omega National Service Fraternity." It's long and some people probably think it's pretentious sounding, but it answers questions right away: 1) it's a national org and 2) it's a service not social org.
As far as the women's orgs being called fraternity vs sorority - what the org does is the important thing - whether it's a "sorority" or "fraternity" the purpose is to uplift and strengthen young women. As long as that is accomplished either name is something to be proud of!
