Branchlet and Stem

Branchlet noun - A small branch or division of a branch (especially a terminal division); usually applied to branches of the current or preceding year.

Stem and branchlet are semantically related. In some cases you can use "Stem" instead a noun "Branchlet".

Stem noun - Cylinder forming a long narrow part of something.

Branchlet and stem are semantically related. Sometimes you can use "Branchlet" instead a noun "Stem".