Almost certainly. If Trump is 1/2 as smart as a dog, or a baby, that still gets him up above 80:
(BBCMaestro)"In his seminal 1994 work, The Intelligence of Dogs, he writes that a typical dog can learn around 165 words, and some super-bright sparks can pick up closer to 250 human terms. As an interesting comparison, a typical two-year-old (human) child knows about 200 words. Like a human baby, your dog learns by association."
Also, though his speech is garbled, it is generally recognizable as English. Long ago a polyglot told me that you could "speak" a language by learning only 80 words, so long as they were the right 80 words. The fact that Trump can manage a 3rd grade level of English makes me think he's got more than 82.
(teachsafeschools.org) "But by this point, they are 3000 to 4000 words behind more advantaged children. Children in third grade at the lowest 25% have an average of 2500 root words, while those in the highest 25% have an average of 6000 to 8000 words."
I have a hard time believing Trump could actively use thousands of words. I think it likely that he has a solid 100 that he pulls up and uses constantly, bigly, and then a vast stew of semi-familiar words he would never be able to use properly himself. We haven't touched on this, but I bet Trump, like any other mammal, draws in lots of information from the tone of voice he is addressed in, or from familiar gestures that evoke comforting memories. Perhaps, like an ant, he gets many of his social cues from following scent trails.