You can suggest a new alias, but they must be approved by an administrator before they are activated.
An example of how to use this: (Neon_Genesis_Evangelion is the tag and Evangelion is the alias. Evangelion -> Neon_Genesis_Evangelion)


Alias To Reason
bunny (4293) rabbit (2809) same thing
eyes_closed (33150) closed_eyes (58306)
cyan_hair (13) aqua_hair (19190) Same thing, really
turquoise_hair (1) aqua_hair (19190)
ichigo_(k-on!) (0) wakaouji_ichigo (139) full character name
tewi (3) inaba_tewi (5568) Combine the tags
race_queen (585) racequeen (172) removing the space
tagme_(artist) (282) artist_request (10806)
katekyo_hitman_reborn! (506) katekyo_hitman_reborn (853)
tie (453) necktie (42650)
kyuubee (1335) kyubey (5117)
sakuraba_milfeulle (1) milfeulle_sakuraba (303) The second is much more used.
defoko (22) utane_uta (88) fan nickname to official name
willaim (0) petticoat (1103) I love it.
cop (1) police (627)
xmas (0) christmas (4934)
boobies (2) breasts (82895)
boobs (3) breasts (82895)
bunny_ears (18556) rabbit_ears (7904)
yamiko (81) yamiya (71) http://www.pixiv.net/member.php?id=176223 artist's pixiv is やみや
big_boobies (0) big_breasts (245)
big_boobs (0) big_breasts (245)
lord_genome (12) lordgenome (126) Lordgenome is the official translation but alot of fans use Lord Genome
tengen_toppa_gurren-lagann (636) tengen_toppa_gurren_lagann (4813) Official spelling is gurren_lagann
blond_hair (98) blonde_hair (166798)
love_is_war (2) koi_wa_sensou_(vocaloid) (472) English name to Japanese name
cosmo_p (0) cosmo_(bousoup) (20) Artist's full username
spiked_hair (2986) spiky_hair (1519)
cloud (22938) clouds (7769) plural (many clounds on a picture)
moero!_justice_gakuen (26) project_justice (10) Japanese to English title
shiritsu_justice_gakuen (57) rival_schools:_united_by_fate (11) Japanese to English title
kemonomimi (320) animal_ears (57615) Japanese and English synonyms.
protoman (0) blues_(rockman) (62) US name=JPN name
toono_akiha (340) tohno_akiha (357)
blushing (18) blush (142796) The same thing, and blush is more common.
griffin (58) griffin (58)
soryu_asuka_langley (1700) souryuu_asuka_langley (3893)
ultimate_madoka (1462) goddess_madoka (876) same thing, latter is more popular
gryphon (8) griffin (58)
donut (5) doughnut (1336)
horo (114) holo (841) official spelling
megaman (26) rockman (1717) USA ver.--->Jpn ver.
megaman_(series) (0) rockman_(series) (0) USA ver. --> Jpn ver.
fatal_frame_iv (0) fatal_frame_4 (206) Roman Numerals
female_protagonist_(pokemon_bw2) (290) mei_(pokemon) (1001) Official name given to the female protagonist in Pokémon Black 2 and White 2.
male_protagonist_(pokemon_bw2) (146) kyouhei_(pokemon) (325) Official name given to the male protagonist in Pokémon Black 2 and White 2.
double_buns (308) double_bun (6345) Same concept, one just has the plural.
laugh (111) laughing (1770) Same thing
hayate_no_gotoku (0) hayate_no_gotoku! (2009) …
little_busters! (2888) little_busters (745)