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 (195) female_domination (11070)
cuckoldry (0) cheating (568)
bi (14) bisexual (4284)
hands_free (0) hands-free (11482)
handsfree (17) hands-free (11482)
cum_in_anus (5) cum_in_ass (60626)
little_penis (19) small_penis (4517)
strap-on (6) strapon (6103)
one_leg_up (3253) raised_leg (18898)
naked (315) nude (603879)
spread (19) spreading (159515)
spreading_butt (24) spread_butt (7832)
spread_ass (78) spread_butt (7832)
spreading_ass (9) spread_butt (7832)
spread_pussy (12899) spreading_pussy (25)
spreading_legs (2) spread_legs (129536)
erection (396707) erect (0)
half-erect (7921) semi-erect (563)
bound (78988) bondage (56952)
(2187) <3 (133315)
muscles (48077) muscle (1588)
legend_of_zelda (210) the_legend_of_zelda (10445) obviously the same, but both tags are used
anamoon (0) auramoonstar (0) personague querido mio
pokemon (552) pokémon (264207)
pokèmon (13) pokémon (264207)
doctor_whooves_(mlp) (292) doctor_whoof_(mlp) (468) Same character, different spellings.
cream_pie (60) creampie (41)
invalid_color (8606) invalid_tag (49717)
twinkle_sez (3) twinkle-sez (1767)
m/m/f (0) male/male/female (54)
herm_on_male (45) herm/male (1652)
tit_job (5) titfuck (15310)
breastjob (6) titfuck (15310)
fat (1563) obese (13054) combine the catagories
herm (23590) intersex (121048) 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 (1652) intersex/male (12840)
herm/female (956) intersex/female (14130)
futanari (470) intersex (121048)
bionic (41) cybernetics (5549) The alias is a broader, more up-to-date synonym of the tag.
3_eyes (652) three_eyes (19)
biomechanical (40) cybernetics (5549) They both refer to the same thing
gay (56640) male/male (189300) e621 tagging
straight (58417) male/female (215875) e621 tagging
lesbian (14052) female/female (34909) e621 tagging
udders (3203) udder (0)
ahri_(lol) (0) ahri (1121) Same character
pokemorph (13) pokémorph (15491)
tits (1474) breasts (837194) Same thing
boobs (190) breasts (837194) same thing
futa (0) futanari (470) same thing