This list of tag pairs that differ by hyphen. The number inside brackets was number of question tagged with that tags.
- port-forwarding (688) portforwarding (57)
- web-services (82) webservices (30)
- mod-security (142) modsecurity (25)
- keepalive (81) keep-alive (21)
- opensource (125) open-source (16)
- virtualpc (79) virtual-pc (16)
- reporting-services (126) reportingservices (14)
- web-farm (48) webfarm (14)
- d-link (21) dlink (13)
- print-server (126) printserver (12)
- read-only (66) readonly (11)
- openmanage (39) open-manage (7)
- sqlserveragent (34) sql-server-agent (7)
- hostheaders (24) host-headers (7)
- msword (12) ms-word (7)
- live-cd (31) livecd (6)
- instantmessaging (15) instant-messaging (5)
- contentfilter (41) content-filter (4)
- visual-studio (66) visualstudio (3)
- log-shipping (26) logshipping (3)
- datetime (17) date-time (3)
- .net2.0 (4) .net-2.0 (2)
- thumbdrive (4) thumb-drive (2)
- virtual-drive (3) virtualdrive (2)