Rotational rhymes with:
computational, confrontational, connotational, gravitational, invitational, representational, aberrational, coeducational, computational, conformational, confrontational, congregational, connotational, conversational, denominational, educational, foundational, generational, gravitational, improvisational, informational, inspirational, intergenerational, investigational, invitational, motivational, navigational, occupational, operational, organizational, recreational, relational, representational, sensational, situational, transformational, vocational
Rotational sounds like:
radmilla, rational, rationale, rationally, retinal, retinol, retinyl, rotationally, routinely