Lesbianism’s covered by Romans 1:26,
http://www.biblegateway.com/passage/?search=ROMANS%201:26&version=ESVUK
“For this reason God gave them up to dishonourable passions. For their women exchanged natural relations for those that are contrary to nature;”
Thank you!
Bible Gateway is a very good site. Here’s the NIV version of that verse.
Romans 1:26 (New International Version)
26 Because of this, God gave them over to shameful lusts. Even their women exchanged natural sexual relations for unnatural ones.