Jam fruit is a type of fruit that is commonly used to make jams, jellies, and preserves. The four most common types of jam fruit are guava (5 letters), gooseberry (10 letters), APRICOT (7 letters), and DAMSON (6 letters). Guava is a tropical fruit with a sweet flavor and a yellow-green skin. Gooseberry is a tart berry with a green or red skin. APRICOT is a sweet, orange-colored fruit with a soft texture. DAMSON is a small, dark purple fruit with a tart flavor. All of these fruits can be used to make delicious jams and preserves.