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 (15206) rabbit (3013) same thing
eyes_closed (103463) closed_eyes (207502)
cyan_hair (230) aqua_hair (55754) Same thing, really
turquoise_hair (6) aqua_hair (55754)
ichigo_(k-on!) (0) wakaouji_ichigo (142) full character name
tewi (4) inaba_tewi (9619) Combine the tags
race_queen (2775) racequeen (0) removing the space
tagme_(artist) (290) artist_request (55037)
katekyo_hitman_reborn! (1067) katekyo_hitman_reborn (852)
tie (955) necktie (188391)
kyuubee (1312) kyubey (6801)
sakuraba_milfeulle (1) milfeulle_sakuraba (467) The second is much more used.
defoko (2) utane_uta (135) fan nickname to official name
willaim (0) petticoat (8792) I love it.
cop (0) police (3964)
xmas (3) christmas (17845)
boobies (2) breasts (841569)
boobs (33) breasts (841569)
bunny_ears (21439) rabbit_ears (14044)
yamiko (106) yamiya (71) http://www.pixiv.net/member.php?id=176223 artist's pixiv is やみや
big_boobies (0) big_breasts (226)
big_boobs (0) big_breasts (226)
lord_genome (12) lordgenome (175) Lordgenome is the official translation but alot of fans use Lord Genome
tengen_toppa_gurren-lagann (612) tengen_toppa_gurren_lagann (6973) Official spelling is gurren_lagann
blond_hair (275) blonde_hair (686868)
love_is_war (3) koi_wa_sensou_(vocaloid) (575) English name to Japanese name
cosmo_p (0) cosmo_(bousoup) (32) Artist's full username
spiked_hair (25909) spiky_hair (1385)
cloud (127115) clouds (3971) plural (many clounds on a picture)
moero!_justice_gakuen (77) project_justice (10) Japanese to English title
shiritsu_justice_gakuen (132) rival_schools:_united_by_fate (8) Japanese to English title
kemonomimi (293) animal_ears (373489) Japanese and English synonyms.
protoman (0) blues_(rockman) (105) US name=JPN name
toono_akiha (775) tohno_akiha (502)
blushing (92) blush (970788) The same thing, and blush is more common.
griffin (196) griffin (196)
soryu_asuka_langley (2768) souryuu_asuka_langley (7460)
ultimate_madoka (3359) goddess_madoka (815) same thing, latter is more popular
gryphon (8) griffin (196)
donut (45) doughnut (5629)
horo (87) holo (1629) official spelling
megaman (31) rockman (4889) USA ver.--->Jpn ver.
megaman_(series) (0) rockman_(series) (1) USA ver. --> Jpn ver.
fatal_frame_iv (0) fatal_frame_4 (224) Roman Numerals
female_protagonist_(pokemon_bw2) (262) mei_(pokemon) (2243) Official name given to the female protagonist in Pokémon Black 2 and White 2.
male_protagonist_(pokemon_bw2) (132) kyouhei_(pokemon) (549) Official name given to the male protagonist in Pokémon Black 2 and White 2.
double_buns (357) double_bun (49779) Same concept, one just has the plural.
laugh (121) laughing (6781) Same thing
hayate_no_gotoku (1) hayate_no_gotoku! (2481) …
alicia_satsuki_mclean (0) alicia_satsuki_mcclane (1)