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 (15214) rabbit (4002) same thing
eyes_closed (103503) closed_eyes (230677)
cyan_hair (253) aqua_hair (59808) Same thing, really
turquoise_hair (6) aqua_hair (59808)
ichigo_(k-on!) (0) wakaouji_ichigo (142) full character name
tewi (4) inaba_tewi (9871) Combine the tags
race_queen (2848) racequeen (0) removing the space
tagme_(artist) (290) artist_request (56748)
katekyo_hitman_reborn! (1120) katekyo_hitman_reborn (852)
tie (995) necktie (208853)
kyuubee (1312) kyubey (6856)
sakuraba_milfeulle (1) milfeulle_sakuraba (467) The second is much more used.
defoko (2) utane_uta (157) fan nickname to official name
willaim (0) petticoat (9221) I love it.
cop (0) police (4237)
xmas (3) christmas (18974)
boobies (2) breasts (868169)
boobs (35) breasts (868169)
bunny_ears (21551) rabbit_ears (17405)
yamiko (111) yamiya (71) http://www.pixiv.net/member.php?id=176223 artist's pixiv is やみや
big_boobies (0) big_breasts (225)
big_boobs (2) big_breasts (225)
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 (7000) Official spelling is gurren_lagann
blond_hair (279) blonde_hair (728401)
love_is_war (3) koi_wa_sensou_(vocaloid) (594) English name to Japanese name
cosmo_p (0) cosmo_(bousoup) (32) Artist's full username
spiked_hair (29785) spiky_hair (1370)
cloud (137122) clouds (3749) 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 (294) animal_ears (408030) Japanese and English synonyms.
protoman (0) blues_(rockman) (105) US name=JPN name
toono_akiha (774) tohno_akiha (529)
blushing (100) blush (1024000) The same thing, and blush is more common.
griffin (216) griffin (216)
soryu_asuka_langley (2771) souryuu_asuka_langley (7660)
ultimate_madoka (3452) goddess_madoka (814) same thing, latter is more popular
gryphon (8) griffin (216)
donut (49) doughnut (6106)
horo (87) holo (1627) official spelling
megaman (32) rockman (4893) 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) (2246) 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 (53134) Same concept, one just has the plural.
laugh (121) laughing (7317) Same thing
hayate_no_gotoku (1) hayate_no_gotoku! (2485) …
alicia_satsuki_mclean (0) alicia_satsuki_mcclane (1)