As nouns the difference between pros and proa
is that pros is while proa is (nautical) a sailing vessel found in the waters of micronesia and indonesia; it has a single, large outrigger and a triangular sail.
pros
English
Noun
(head)
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proa
Alternative forms
* prau, prahu, perahu
Noun
(
en noun)
(nautical) A sailing vessel found in the waters of Micronesia and Indonesia; it has a single, large outrigger and a triangular sail.