This list of tag pairs that differ by pluralization. The number inside brackets was number of question tagged with that tags.

## Untouched tags

* [tag:services] (356)  [tag:service] (243)
* [tag:hosts] (179) [tag:host] (149)
* [tag:connection] (477)    [tag:connections] (63)
* [tag:packages] (92)   [tag:package] (62)
* [tag:image] (161) [tag:images] (60)
* [tag:headers] (82)    [tag:header] (56)
* [tag:domain] (1638)   [tag:domains] (53)
* [tag:share] (130) [tag:shares] (43)
* [tag:library] (53) [tag:libraries] (34)
* [tag:template] (34)   [tag:templates] (32)
* [tag:index] (73)  [tag:indexes] (31)
* [tag:packet] (68) [tag:packets] (28)
* [tag:alias] (215) [tag:aliases] (25)
* [tag:protocol] (31)   [tag:protocols] (25)
* [tag:cookies] (71)    [tag:cookie] (24)
* [tag:request] (69)    [tag:requests] (22)
* [tag:virtual-directory] (45) [tag:virtualdirectories] (22)
* [tag:vulnerabilities] (43) [tag:vulnerability] (18)
* [tag:route] (316) [tag:routes] (15)
* [tag:path] (163)  [tag:paths] (15)
* [tag:alerts] (98) [tag:alert] (15)
* [tag:netflow] (23)    [tag:netflows] (13)
* [tag:font] (20)   [tag:fonts] (13)
* [tag:instance] (33)   [tag:instances] (12)
* [tag:wildcard] (143)  [tag:wildcards] (11)
* [tag:servlet] (29)    [tag:servlets] (11)
* [tag:device] (52) [tag:devices] (10)
* [tag:restrictions] (30)   [tag:restriction] (10)
* [tag:providers] (14)  [tag:provider] (8)
* [tag:stats] (15)  [tag:stat] (7)
* [tag:language] (30)   [tag:languages] (6)
* [tag:interrupts] (37) [tag:interrupt] (4)
* [tag:vhosts] (295)    [tag:vhost] (122) **<--- synonym of** [tag:virtualhost] ?


## Post-cleaning tags

### Keep both tags

* [tag:http] (1266) [tag:https] (1060) **<--- different protocol**
* [tag:smtp] (1712) [tag:smtps] (3) **<--- different protocol**

### Keep one tag, burn the other

* [tag:loop] &#10007;   [tag:loops] &#10003;
* [tag:sockets] &#10007;   [tag:socket] &#10003;
* [tag:group] &#10007;    [tag:groups] &#10003;
* [tag:interfaces] &#10007;    [tag:interface] &#10003;
* [tag:guides] &#10007;  [tag:guid] &#10003;
* [tag:backups] &#10007;    [tag:backup] &#10003;
* [tag:applications] &#10007;   [tag:application] &#10003;
* [tag:partitions] &#10007;  [tag:partition] &#10003;
* [tag:records] &#10007; [tag:record] &#10003;
* [tag:drives] &#10007;  [tag:drive] &#10003;
* [tag:jails] &#10007; [tag:jail] &#10003;
* [tag:graphs] &#10007;  [tag:graph] &#10003;
* [tag:application-pool] &#10007; [tag:application-pools] &#10003;
* [tag:fileservers] &#10007; [tag:file-server] &#10003;
* [tag:credential] &#10007; [tag:credentials] &#10003;
* [tag:attachments] &#10007; [tag:attachment] &#10003;
* [tag:mailing-lists] &#10007; [tag:mailing-list] &#10003;
* [tag:startupscript] &#10007;  [tag:startup-scripts] &#10003;
* [tag:tasks]  &#10007; [tag:task] &#10003;
* [tag:commands] &#10007;    [tag:command] &#10003;
* [tag:clusters] &#10007;   [tag:cluster] &#10003;
* [tag:administrators] &#10007; [tag:administrator] &#10003;
* [tag:logins] &#10007; [tag:login] &#10003;
* [tag:webapplication] &#10007; [tag:web-applications] &#10003;
* [tag:tutorials] &#10007;   [tag:tutorial] &#10003;
* [tag:sysctls]  &#10007; [tag:sysctl] &#10007;

### Burn both tags

* [tag:modules] &#10007;   [tag:module] &#10007;
* [tag:browsers] &#10007;   [tag:browser] &#10007;
* [tag:parallels] &#10007;  [tag:parallel] &#10007;
* [tag:mysites] &#10007; [tag:mysite] &#10007;
* [tag:notification] &#10007;   [tag:notifications] &#10007;
* [tag:plugin] &#10007; [tag:plugins]  &#10007;
* [tag:volume] &#10007; [tag:volumes] &#10007;
* [tag:transactions] &#10007;   [tag:transaction] &#10007;
* [tag:serial-ports]  &#10007; [tag:serial-port]  &#10007;
* [tag:blade] &#10007;  [tag:blades] &#10007;
* [tag:table] &#10007;  [tag:tables] &#10007;
* [tag:parameters] &#10007; [tag:parameter] &#10007;
* [tag:communication] &#10007;  [tag:communications] &#10007;

### Other action

* [tag:disk] synonymized to [tag:hard-drive]
* [tag:disks] &#10007;
* [tag:zone] synonymized to [tag:dns-zone]
* [tag:zones] &#10003;
* [tag:virus] synonymized to [tag:malware]
* [tag:viruses] &#10007;
* [tag:locale] and [tag:locales] synonymized to [tag:localization]
* [tag:local]  &#10003;
* [tag:cables] and [tag:cabling] synonymized to [tag:cable]
* [tag:webservice]  [tag:webservices] synonymized to [tag:web-services]

&#10003; = tag will stay; &#10007; = tag have been removed