The synonym of the word 'Ostentatious' is -

- উল্লেখিত প্রশ্নে Ostentatious এর synonym হচ্ছে Conspicuous.

Ostentatious (adjective)
English Meaning: Intended to attract admiration or notice.
Bangla Meaning: লোক-দেখাতে পছন্দ করে এমন; জাঁকালো: in an ostentatious manner.
Synonyms: Pretentious (আত্মাভিমানী), Conspicuous (দৃষ্টি-আকর্ষক), Flamboyant (জাঁকালো), Classy(অভিজাত), Swank (সদম্ভ)।
Antonyms: Plain (সরল), Unobtrusive (অনতিলক্ষ্য), Restrained (নিরাবেগ), Modest (পরিমিত), Natural (প্রাকৃতিক)।

Other Forms: Ostentatiously (adverb) - জাঁকজমকপূর্ণভাবে।
Example Sentence: 
1. They contribute generously to village and family enterprises and avoid ostentatious displays of affluence.
2. It’s an ostentatious display of knowledge.

Source: Lecture.