There’s a substantial number of Italian loanwords in Modern Greek. Many of those loanwords are specifically from Venetian, rather than Tuscan Italian, because a large part of Greece was under Venetian rule for centuries. (And a large number of Greek islands were ruled by other Northern Italian republics.) Italian was also the language through which Greece was exposed to the West for centuries. Lexicography does not differentiate Venetian and Italian consistently.
The post Ιταλικές και βενετσιάνικες λέξεις στα ελληνικά at the lexilogia forum links to 891 headwords listed as Venetian in the Triantafyllidis dictionary, and 2468 as Italian (out of 47,000 entries.) The post is wrong, because the search they link to also retrieves entries from Kriaras’ Early Modern Greek dictionary, hosted at the same site; but the number is substantial, and I agree that most Modern Greek loanwords are from Italian and Venetian.
As a sampler, this PDF: http://www.greek-language.gr/gre…, a guide for teachers of Greek as a Foreign Language, gives the following examples of “Italian” loans:
αντένα, βάρκα, βελούδο, βεντέτα, βίζιτα, βίλα, βιολί, βόλτα, γάντι, γάτα, γούστο, κάλτσα, κανάλι, καπετάνιος, καπρίτσιο, κάρβουνο, καρέκλα, κάσα, κασετίνα, κόλπο, κομπόστα, κόστος, κότερο, κουβέρτα, κούνια, λάμπα, μπάνιο, μπαρκάρω, μπαστούνι, μπότα, μπουκάλι, μπουρίνι, μπράτσο, όπερα, παντελόνι, πατάτα, πόζα, ράτσα, ρεντίκολο, ρόδα, σαλάμι, σβέλτος, σερβίρω, σκούρος, σούπα, σπίρτο, στάμπα, τενόρος, τραμουντάνα, φουρτούνα.
antena, varka, veluðo, vendeta, vizita, vila, violi, volta, ɣanti, ɣata, ɣusto, kaltsa, kanali, kapetanios, kapritsio, karvuno, karekla, kasa, kasetina, kolpo, komposta, kostos, kotero, kuverta, kunia, lampa, banio, barkaro, bastuni, bota, bukali, burini, bratso, opera, panteloni, patata, poza, ratsa, redikolo, roða, salami, sveltos, serviro, skuros, supa, spirto, stampa, tenoros, tramuntana, furtuna.
antenna, boat, velvet, feud, visit (esp. to a doctor or prostitute), villa, violin, stroll, glove, cat, good taste, sock, channel, captain, caprice, coal, chair, trunk, pencil case, trick, fruit preserve, cost, yacht, blanket, cradle, lamp, bath, embark, cane, boot, bottle, squall, arm, opera, pants, potato, pose, race, figure of ridicule, wheel, salami, swift, serve food, dark, soup, matchstick or spirits, stamp, tenor, north wind, storm.