How many words start with PRO?

32, from 5 letters up to 5. All of them are on this page.

What is the highest scoring word that start with PRO?

PROXY at 17 points in Scrabble, and PROXY at 17 in Words With Friends, because the two games score the tiles differently.

PROAS, PROBE, PROBS, PRODS, PROEM, PROFS, PROGS, PROIN, PROKE, PROLE and 22 more on this page.

32 of them: PROAS, PROBE, PROBS, PRODS, PROEM, PROFS, PROGS, PROIN, PROKE, PROLE and more.

There are 32 of them. The highest scoring is PROXY at 17 points in Scrabble, and the set averages 8.7.

Most common words first, then the rest A to Z.

The most familiar words on this page and what they mean. Tap any word for its full entry, score and anagrams.

PROOF noun any factual evidence that helps to establish the truth of something
PROUD adjective feeling self-respect or pleasure in something by which you measure your self-worth
PROVE verb be shown or be found to be
PROXY noun a person authorized to act for another
PROBE noun an inquiry into unfamiliar or questionable activities
PROMO noun a message issued in behalf of some product or cause or idea or person or institution
PROSE noun ordinary writing as distinguished from verse
PROPS noun proper respect
PRONE adjective having a tendency (to)
PROTO adjective indicating the first or earliest or original

Definitions from Open English WordNet, CC BY 4.0.

All of them: Word lists.