Nationally rhymes with:
internationally, internationally, irrationally, rationally, additionally, conditionally, congressionally, constitutionally, conventionally, educationally, exceptionally, fractionally, functionally, generationally, institutionally, intentionally, internationally, irrationally, nutritionally, operationally, professionally, proportionally, rationally, rotationally, traditionally, unconditionally, unconstitutionally, unintentionally
Nationally sounds like:
nathanael, nathaniel, national, nationale