Bakelite is a cross-linked polymer of formaldehyde and:

Bakelite is a thermosetting polymer prepared from two monomers: formaldehyde (HCHO) and phenol. The initial condensation of phenol with formaldehyde gives a linear, fusible polymer called Novolac. Novolac is then cross-linked with more formaldehyde under acidic or basic conditions to give the hard, infusible, three-dimensional network polymer known as Bakelite.

PHBV is a biodegradable polymer (polyhydroxybutyrate-co-hydroxyvalerate), Buna-S is a copolymer of butadiene and styrene (a synthetic rubber), and Dacron is a polyester used as synthetic fibre — none of these are related to Bakelite.

Therefore, Bakelite is a cross-linked polymer of formaldehyde and Novolac.