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
femdom (154) female_domination (6651)
cuckoldry (0) cheating (564)
bi (13) bisexual (3145)
hands_free (0) hands-free (7901)
handsfree (16) hands-free (7901)
cum_in_anus (3) cum_in_ass (39619)
little_penis (14) small_penis (2431)
strap-on (5) strapon (4362)
one_leg_up (1358) raised_leg (12271)
naked (230) nude (413299)
spread (14) spreading (109425)
spreading_butt (20) spread_butt (3699)
spread_ass (81) spread_butt (3699)
spreading_ass (9) spread_butt (3699)
spread_pussy (8307) spreading_pussy (18)
spreading_legs (0) spread_legs (89813)
erection (262263) erect (4299)
half-erect (4524) semi-erect (1077)
bound (53552) bondage (40176)
(2223) <3 (75769)
muscles (48185) muscle (3193)
legend_of_zelda (202) the_legend_of_zelda (6700) obviously the same, but both tags are used
anamoon (0) auramoonstar (0) personague querido mio
pokemon (367) pokémon (161943)
pokèmon (11) pokémon (161943)
doctor_whooves_(mlp) (255) doctor_whoof_(mlp) (472) Same character, different spellings.
cream_pie (59) creampie (26)
invalid_color (7358) invalid_tag (38251)
twinkle_sez (3) twinkle-sez (1222)
m/m/f (0) male/male/female (37)
herm_on_male (49) herm/male (1123)
tit_job (5) titfuck (10090)
breastjob (5) titfuck (10090)
fat (1741) obese (7115) combine the catagories
herm (18756) intersex (77307) The tags "herm," "maleherm," and "cuntboy" (and a few others) all fall under the classification "intersex;" I wouldn't alias the other two as they are often excluded or searched seperately.
herm/male (1123) intersex/male (6016)
herm/female (581) intersex/female (7092)
futanari (476) intersex (77307)
bionic (22) cybernetics (2751) The alias is a broader, more up-to-date synonym of the tag.
3_eyes (63) three_eyes (21)
biomechanical (21) cybernetics (2751) They both refer to the same thing
gay (59682) male/male (98524) e621 tagging
straight (62219) male/female (108138) e621 tagging
lesbian (14460) female/female (18012) e621 tagging
udders (1864) udder (2)
ahri_(lol) (3) ahri (761) Same character
pokemorph (13) pokémorph (10372)
tits (1536) breasts (529578) Same thing
boobs (175) breasts (529578) same thing
futa (1) futanari (476) same thing