When I was at tech school in early 90s the old engine teacher said we couldn't call them dykes. So we called them "women in comfortable shoes."Reminds me of a story....
Years ago I worked at a salvage yard. The person hired to test down the incoming vehicles was a lesbian woman in her late twenties. Very butch. She made no secret of her preference.
Anyway, one day the owner of the yard was doing something, asked that girl to hand him some dykes.
She looked at him and said "Those are called 'sidecutters' ."
From that time forward, we called her Sidecutter.