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
aoi_canaan (13) aoi_kanan (15) Aoi Kanan is how the actual person spells it http://www.alpha-net.ne.jp/users2/usarabi8/prof.html
saliva_trail (2316) saliva_string (1) same
gray (2) grey (205)
ano_hi_mita_hana_no_namae_wo_bokutachi_wa_mada_shiranai (0) ano_hi_mita_hana_no_namae_o_bokutachi_wa_mada_shiranai. (0) http://anidb.net/perl-bin/animedb.pl?show=anime&aid=8181
masturbating (2) masturbation (18855)
anohana (0) ano_hi_mita_hana_no_namae_o_bokutachi_wa_mada_shiranai. (0) same anime
masturbate (14) masturbation (18855)
suck (61) sucking (632)
ぴー (1) pii (3) Japanese script in tags just isn't cool.
stiky_finkaz (240) stiky-finkaz (0)
komatsu_eiji (890) komatsu_e-ji (1)
komatsu_eiji (890) co2a (0)
komatsu_eiji (890) co2a's (0)
komatsu_eiji (890) co2as (0)
uncut (5) uncircumcised (6) Describes the same thing.
condoms (0) condom (4894) Don't see why we need to differentiate between a single and multiple condoms in tags.
ano_hi_mita_hana_no_namae_wo_bokutachi_wa_mada_shiranai (0) ano_hi_mita_hana_no_namae_wo_bokutachi_wa_mada_shiranai. (1990) anidb.net
ikkitousen (2896) ikki_tousen (1) another typo
night_shift_nurses (65) yakin_byoutou (375) same
print_panties (1653) printed_panties (4)
techno-fuyuno (42) techno_fuyuno (59) Artist; spelling
techno_fuyuno (59) fuyuno_haruaki (280) Same artist; consolidation to larger group
hilda_(beelzebub) (148) hildegard (5) Full name
black_board (7) chalkboard (1851) Consolidation
blackboard (69) chalkboard (1851) Consolidation
sui-feng (545) soi_fon (0) Wrong name
inma_seiden (6) shin_seiki_inma_seiden (62) http://anidb.net/perl-bin/animedb.pl?show=anime&aid=736
maribel_hearn (1682) maribel_han (331) Alternative spelling - most other places mainly use "Han"
souffle_rossetti (47) peppita_rossetti (14) Japanese original name
peppita_rossetti (14) souffle_rossetti (47) Souffle is the original Japanese name; previous alias request was incorrect.
star_ocean_3 (105) star_ocean_till_the_end_of_time (544) Consolidation into larger group
kerrigan (0) sarah_kerrigan (34) same character
rope_marks (33) rope_burn (28) Referring to the same thing.
beg (0) begging (93) same
crouch (67) squatting (7910) same thing
crouching (92) squatting (7910) same thing
winking (12) wink (79698) same thing
kami-sama_no_memo-chou (118) kami-sama_no_memo-chou (118) To avoid future mistakes, keep in the most used name. 1 myanimelist.net/anime/10568/Kamisama_no_Memochou
kamisama_no_memo_chou (3) kami-sama_no_memo-chou (118) To avoid future mistakes, keep in the most used name. 2 myanimelist.net/anime/10568/Kamisama_no_Memochou
erementar_gerad_flag_of_blue_sky (3) erementar_gerad_ao_no_senki (3) Original name in japanese. Like elemental gelade > erementar gerad
blade_(lovewn) (0) blade_(artist) (396) Same artist
male_on_futa (18) futa_on_male (71) same
restraining (0) restrained (5460)
restrain (138) restrained (5460) same thing
restraint (5) restrained (5460)
idols_galore (125) meshi_mase_idol (0) original Japanese name
sakura_ryuuken (115) sakura_ryuken (102)
narukami_yuu (2655) seta_souji (1069) different names for the same character from the Persona 4 manga / anime, seta_souji has a lot more entries already
rutee_katrea (90) rutee_katret (9) original Japanese name
apache (8) emilou_apacci (63) Complete and correct name. bleach.wikia.com