Difference between Stuffs and Whatchamacallit

STUFFS vs WHATCHAMACALLIT: NOUN

Miscellaneous unspecified objects
Something whose name is unknown or forgotten.
Any object whose name is forgotten, or not known.
A metasyntactic term used for any object whose actual name you don’t know or can’t remember. There are many spellings and many synonyms.
Something unspecified whose name is either forgotten or not known

Overindulge, Overeat, Glut, Engorge, Binge, Sundries, Clobber, Lug, Cram, Jam, Shove, Poppycock, Material, Whatchamacallit, Hooey

Hmph, Fiddlesticks, Swizzle stick, Weenie, Whatcha, Whaddaya, Dingus, Thingy, Whatsit, Thingamabob, Thingamajig, Whatsis, Sundries, Sundry, Stuff

Squeeze, Sundry, Fill, Overindulge, Overeat, Glut, Engorge, Binge, Sundries, Clobber, Cram, Jam, Poppycock, Material, Whatchamacallit

Srsly, Shazam, Bunghole, Asshat, Hmph, Fiddlesticks, Swizzle stick, Weenie, Whatcha, Whaddaya, Dingus, Thingy, Sundries, Sundry, Stuff

Amazing obscure extreme metal and other random stuffs.
DHL normally hands off their stuffs to USPS.
"Paulo is vey friendly and knows the stuffs.
When he moved, stuffs it under his arm!
They really sell good stuffs imported from Japan.
The permanent stuffs are known as regular employees.
He has interest in gadgets and technical stuffs.
AAA Moving Group handled my stuffs very carefully.
Christmas stuffs verwenden Cookies, views of snowed countrysides and other Christmas stuffs Richard Side, and company draw.
Stuffs like names, messages, browsing history, emails and a lot of stuffs.

Guy or a clinical findings you wish whatchamacallit employees are side after the doctor excuse has a licensed doctors?