सीतानाथ समारम्भां रामानन्दार्य मध्यमाम्।
अस्मदाचार्य पर्यन्तां वन्दे श्रीगुरू परम्पराम् ।।
If you go with the word “Really" than “No”, Śrī Ram is NOT an Avatār of Śrī Hāri Vīshnu, their are many proofs of that itself from Vedās and from Śrīmad Rāmāyan (Śrī Mānas & Vālmīki) which clearly says that Sri Rām is Avatāri not Avatār. And another thing to curious one please use the word Śrī before taking my lord's name like Śrī Rām, Śrī Vishnu.
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ततस्त्वमसि दुर्धर्षात्तस्माद् भावात् सनातनात् ।
रक्षार्थं