Gravitational rhymes with:
computational, confrontational, connotational, invitational, representational, rotational, aberrational, coeducational, computational, conformational, confrontational, congregational, connotational, conversational, denominational, educational, foundational, generational, improvisational, informational, inspirational, intergenerational, investigational, invitational, motivational, navigational, occupational, operational, organizational, recreational, relational, representational, rotational, sensational, situational, transformational, vocational