Added alias:
sing → singing
carrot → carrots
cookie → cookies
cup → cups
can → cans
Revised:
sweet_potato → yam existed, so I did sweet_potato → yams and yam → yams
Just changed the tags (no alias):
chocolates → chocolate
cook → cooking
jelly → jam [also, tagtype back to 'general']
juice_box → juicebox
raspberry → raspberries
sip → sipping
tea_pot → teapot
tea_cup → teacup
Must have been fixed/removed already:
teacup → cup
In general, if we're talking like less than 20 images in the 'alias from...' tag, I'm more likely to just change the tags than do an alias. sip -> sipping is an example. There were no 'sip' images (when I checked), and only 5 'sipping.' Raspberry/ies has 5 images combined. There were only 7 'cook' images and 2 were already also tagged 'cooking'. (etcetera)
If we have (e.g.) 200 images under 'stuff' and 13 under 'stuffx' and stuffx = stuff for all intents and purposes, then you can feel pretty confident in just going ahead and changing the tag, rather than submitting an alias. If you have significant doubts, then yes, come ask. But if it's just a really no-brainer change, it's okay to do it manually.
Because, otherwise, I'll wind up spending my every moment on danbooru adding a million plural aliases for 15 image tags =P