UnScramble this Word: s n i e f s d e?

Questions

Common inclusive term used to describe physical discomfort of the upper gastrointestinal tract, associated with eating or drinking?

Common name applied generally to certain members of a family of relatively small salamanders, most of which spend at least part of their lives in water?

Common name applied to a group of vegetable products, both amorphous & crystalline, obtained from various plants, & important commercially in the tanning of leather?

Common name applied to a perennial, trailing herb of the morning glory family?

Common name applied to any of a family of evergreen shrubs & trees?