pro·a 
(prōə) also prau (prou) or prah·u (prä)
(prōə) also prau (prou) or prah·u (prä)n.
A swift traditional sailboat especially in Southeast Asia and Micronesia, having a triangular sail and single outrigger.
[Alteration (probably influenced by Portuguese and Spanish proa, prow) of Early Modern English prow, alteration (influenced by PROW) of earlier praw, ultimately (probably partly via Dutch prauw, proa and Portuguese parao, a kind of deckless boat used in the Indian ocean, proa; and Portuguese, partly also from Malayalam pāru, boat) from Malay perahu and perhaps also Javanese prau, both from Proto-Malayo-Polynesian *paraqu; compare Ngadha (Malayo-Polynesian language of Flores) barau, sailboat, and Tolai (Malayo-Polynesian language of northeast New Britain) parau, boat.]
- underreaction
- underreport
- underrepresent
- underrepresentation
- underrepresented
- underrun
- under sail
- underscore
- undersea
- under seal
- undersecretariat
- undersecretary
- undersell
- underseller
- underserve
- underset
- undersexed
- undershirt
- undershoot
- undershorts
- undershot
- undershrub
- underside
- undersign
- undersigned