This species is characterized by its medium-sized to robust, leathery, elliptic leaves, small stipules, axillary and terminal, cymose inflorescences borne on several fasciculate peduncles, short calyx limbs, medium-sized corollas with the tubes longer than the lobes, and medium-sized subglobose to oblate fruits. The secondary leaf veins do often loop to interconnect near the margins but usually only weakly. The leaves often dry darkened or yellow-green. The inflorescences are unusual and distinctive, with sevral slender fasciculate peduncles borne on thickened, short, perhaps persistent shoots at the stem apices and bearing cymes of flowers. This species is documented by few collections but they all report the plants to be relatively large for Faramea, 7-18 m tall.

Faramea robusta is similar to Faramea colombiana, which the flowers borne in branched cymes and corollas with the tube shorter than the lobes. Faramea robusta is also similar vegetatively and in inflorescence arrangement to Faramea polytriadophora of Surinam, which has shorter peduncles, longer pedicels, and smaller corollas. Faramea robusta is also so similar to Faramea monsalveae of western Colombia, which has 1-3 well developed axillary peduncles each with several fasciculate flowers and corollas with the tube shorter than the lobes.