The term GEOMETRY TRUTH is composed of two words: 'GEOMETRY' and 'truth'. GEOMETRY is a branch of mathematics that deals with the study of shapes, sizes, and relative positions of figures and with the properties of space. An AXIOM is a statement or proposition that is regarded as being established, accepted, or self-evidently true. In GEOMETRY, an AXIOM is a statement that is assumed to be true without proof. Therefore, the crossword solution for the term GEOMETRY TRUTH is AXIOM.