Rocket sits next to 4 phonetic neighbors — Rocky, Rockett, and Rock are the closest matches by sound. Most share Rocket's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"a fast-moving projectile, symbol of speed and ambition"
"variant of Karen or Karin"
"lotus flower, love"
"little saint, holy one"
"my help, my helper"
"anointed one who carries"
"deep valley dweller"
"dear friend, beloved companion"
"brightness, radiance"
"little warrior or little church man"
"see, the son"
"flowing river, running water"
"bear strength"
"my God is strength"
"son of Tray"
"zero, the concept of nothing"
"food, sustenance"
"short land, curtailed land"
"black, swarthy"
"to increase, to grow"
Similar sound: These names share phonetic patterns with Rocket — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Italian rocchetta via English origins, giving them the same cultural heritage as Rocket.
Rhythm: Rocket is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.