Forgive me if I'm doing this wrong, but I didn't want to spam a few dozen threads all at once :) And some of these should be discussed a bit.
To start off, some quick and easy implications aliases:
spike_collar -> spiked_collar
spiked_choker -> spiked_collar
spiked_bracelets -> spiked_braceletspiked_cuffs -> spiked_bracelet
spiked_wristband -> spiked bracelet
skyscrapers -> skyscraper
armlets -> armlet
All Most of these were heavily used (10-60 posts) until I tidied them up. No big fuss, just a relatively common mistagging.
Also the skyscraper just snuck in. Didn't you know skyscrapers are sneaky? They are!
Now to the more complicated ones...
Pick one: spiked_armlet or spiked_armband.
Spiked_armlet has 164 posts, spiked_armband has 26.
These numbers are posted to indicate which language is more commonly used on the site, not as a recommendation of merging them: Armband has 2770 posts, armlet has 1515 posts.
Armlets has 56, and should be aliased off to Armlet.
Both spiked_armlet and spiked_armband, of course, have some other related tags that will need cleaning up too. (like "black_spiked_armband" or similar)... I like "spiked_armband" though. You could make an argument that an 'armlet' is for more delicate jewelry sorts of things, and this that spiked_armbands is more logical for the thick, black spiked leather straps that we see most commonly... but then, that would suggest that then our spiked_bracelets should be spiked_wristbands. However, people have already indicated that they prefer spiked_bracelet over spiked_wristband, by proxy of heavy use.
Pick one: spikey_hair or spiked_hair
Spikey has 28 posts, Spiked has 52. That said, I prefer spiked as it lines up with other tags about spiked things.
Pick one: tail_spikes or spiked_tail
They describe what is effectively the same thing: the spikes on a tail or a tail with spikes. Thus: having both would be redundant.
Tail_spikes matches with the naming trend of spikes-on-the-body (head_spikes, face_spikes, chest_spike).. however, while Spiked_tail DOES matches with all of the above clothing-related posts, it's more likely to be used on a character with other forms of spikes.. thus, it's more intuitive to have the 'body part spikes' all named as '(part)_spikes'. (Though, see below regarding plurality.)
Whichever is chosen, tail_spike (singular) should be aliased to it as well :)
Plurality of body-spikes?
We have head_spikes and face_spikes and shoulder_spikes... yet have a chest_spike. Should it be head_spike or head_spikes? Of course chest_spike is almost entirely used to describe lucario and gardevoir (each of which have a single spike.) ... with the exception of one neat spikey dragonish guy and one picture with spikes-as-nipples. (Oh e621. I missed you.)
I dunno. face_spikes seems more intuitive, but... post #1160974 technically only has one 'face spike' and we seem to prefer singular in most cases...
Eh, whatever. The answer is probably to leave it as is, but...
Spikes? On my hands?? It's more likely than you think
Good gosh, there's a lot of tags for spikes-on-hands... Spiked_knuckles, spiked_gloves, spiked_glove, spiked_gauntlets, spiked_bracers, spiked fists and I think I might be missing a few. Obviously, it can mostly go down to spiked_gloves but then you have brass-knuckles-but-with-spikes... and then there's the fact that some of these are tagged to pictures of Knuckles or similar sonic fan characters. Not that any of these are super commonly used. I'm getting tired and didn't feel like making a decision yet.
But seriously: what's up with Knuckle's hands? post #1361690 Are they spiked_gloves? are they hand_spikes? Both? Will the world ever discover the answer?
Wrapping up...
Spiked_collar and spiked_bracelet both imply spikes ... there are many other spiked_* things that should imply spikes. (obviously, I can put together a list, if people would like)
Spikeless seems to be used on 5 lucario pictures that lack a spike. However... this seems like a rather broad tag that shouldn't exist, IMHO... as it'd apply to most pictures. Maybe something like spikeless_lucario, but there are only 5 posts with spikeless anyway, and 2 of them I'm not even sure deserve the 'spikeless' tag.
Okay, I'm done now. <3
Updated by Dyrone