Breadcrumb Home > Thesaurus > P Synonyms of porthole Find synonyms for: Noun 1. porthole, window usage: a window in a ship or airplane 2. port, embrasure, porthole, opening usage: an opening (in a wall or ship or armored vehicle) for firing through WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of porthole (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: recherch Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language