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 (11422) rabbit (2910) same thing
eyes_closed (103291) closed_eyes (124611)
cyan_hair (16) aqua_hair (41144) Same thing, really
turquoise_hair (4) aqua_hair (41144)
ichigo_(k-on!) (0) wakaouji_ichigo (141) full character name
tewi (4) inaba_tewi (8899) Combine the tags
race_queen (1728) racequeen (44) removing the space
tagme_(artist) (288) artist_request (44366)
katekyo_hitman_reborn! (950) katekyo_hitman_reborn (853)
tie (871) necktie (124116)
kyuubee (1322) kyubey (6503)
sakuraba_milfeulle (1) milfeulle_sakuraba (456) The second is much more used.
defoko (2) utane_uta (107) fan nickname to official name
willaim (0) petticoat (5116) I love it.
cop (0) police (2653)
xmas (2) christmas (12824)
boobies (2) breasts (524992)
boobs (5) breasts (524992)
bunny_ears (18056) rabbit_ears (5991)
yamiko (91) yamiya (71) http://www.pixiv.net/member.php?id=176223 artist's pixiv is やみや
big_boobies (0) big_breasts (176)
big_boobs (0) big_breasts (176)
lord_genome (12) lordgenome (174) Lordgenome is the official translation but alot of fans use Lord Genome
tengen_toppa_gurren-lagann (614) tengen_toppa_gurren_lagann (6712) Official spelling is gurren_lagann
blond_hair (272) blonde_hair (497395)
love_is_war (3) koi_wa_sensou_(vocaloid) (526) English name to Japanese name
cosmo_p (0) cosmo_(bousoup) (24) Artist's full username
spiked_hair (13188) spiky_hair (1458)
cloud (79267) clouds (5808) plural (many clounds on a picture)
moero!_justice_gakuen (69) project_justice (10) Japanese to English title
shiritsu_justice_gakuen (128) rival_schools:_united_by_fate (9) Japanese to English title
kemonomimi (288) animal_ears (214375) Japanese and English synonyms.
protoman (0) blues_(rockman) (97) US name=JPN name
toono_akiha (758) tohno_akiha (351)
blushing (68) blush (630701) The same thing, and blush is more common.
griffin (131) griffin (131)
soryu_asuka_langley (2774) souryuu_asuka_langley (5160)
ultimate_madoka (2919) goddess_madoka (828) same thing, latter is more popular
gryphon (8) griffin (131)
donut (36) doughnut (3943)
horo (87) holo (1437) official spelling
megaman (28) rockman (4150) USA ver.--->Jpn ver.
megaman_(series) (0) rockman_(series) (1) USA ver. --> Jpn ver.
fatal_frame_iv (0) fatal_frame_4 (220) Roman Numerals
female_protagonist_(pokemon_bw2) (262) mei_(pokemon) (1702) Official name given to the female protagonist in Pokémon Black 2 and White 2.
male_protagonist_(pokemon_bw2) (133) kyouhei_(pokemon) (512) Official name given to the male protagonist in Pokémon Black 2 and White 2.
double_buns (361) double_bun (29956) Same concept, one just has the plural.
laugh (120) laughing (4781) Same thing
hayate_no_gotoku (1) hayate_no_gotoku! (2452)
alicia_satsuki_mclean (0) alicia_satsuki_mcclane (1)