Names #516, #641 · Viṣṇu Sahasranāma
अमितविक्रमःamitavikramaḥ
Amitavikrama — appears 2 times in the stotram, each with its own meaning
Name #516
He of unbounded prowess
From shloka 55 · chapter Vāmana
जीवो विनयिता साक्षी मुकुन्दोऽमितविक्रमः ।
अम्भोनिधिरनन्तात्मा महोदधिशयोऽन्तकः ॥
jīvo vinayitā sākṣī mukundo'mitavikramaḥ
ambhonidhiranantātmā mahodadhiśayo'ntakaḥ
Also in this shloka: jīvaḥ · vinayitā sākṣī · mukundaḥ · ambhonidhiḥ · anantātmā · mahodadhiśayaḥ · antakaḥ
Name #641
He of limitless valor
From shloka 68 · chapter Rāma
अर्चिष्मानर्चितः कुम्भो विशुद्धात्मा विशोधनः ।
अनिरुद्धोऽप्रतिरथः प्रद्युम्नोऽमितविक्रमः ॥
arciṣmānarcitaḥ kumbho viśuddhātmā viśodhanaḥ
aniruddho'pratirathaḥ pradyumno'mitavikramaḥ
Also in this shloka: arciṣmān · arcitaḥ · kumbhaḥ · viśuddhātmā · viśodhanaḥ · aniruddhaḥ · apratirathaḥ · pradyumnaḥ