solemn
Slaves
ohshit
Dabble
angora
compaq
quorum
Gasket.
A six-letter word for "tart" is "sourly." It describes a taste that is sharp, acidic, or tangy, similar to the flavor profile of a tart. Another option could be "aceric," which relates to something that has a sour taste.
Muumuu, a type of loose dress.
sensex
Id say "friction" but that isn't 6 letters
Anthem is a six letter word ending with them.