Annoyingly, they are also called “cob lights”.
Cob lightbulbs

Not to be confused with COB technology (blue/UV chips directly bonded to the board rather than the usual plastic or ceramic package and poured over with protective and phosphorous resin, usually used for high power density thanks to better heat dissipation):
COB lightbulb
Technically, filament bulbs are also COB (the filaments are tiny PCBs, rigid or flexible):
Image

Also, some are both cob and COB:
Cob COB lightbulb