WordNet (r) 3.0 (2006):

systematics
    n 1: the science of systematic classification

Moby Thesaurus II by Grady Ward, 1.0:

55 Moby Thesaurus words for "systematics":
   Buddhology, Mariolatry, Mariology, Mercersburg theology,
   antonomasia, apologetics, binomial nomenclature, biosystematics,
   biosystematy, canonics, class, classification, crisis theology,
   dialogical theology, divinity, doctrinalism, doctrinism, dogmatics,
   eschatology, existential theology, family, genus, glossology,
   hagiography, hagiology, hierology, kingdom, logos Christology,
   logos theology, natural theology, neoorthodox theology,
   neoorthodoxy, nomenclature, onomastics, onomatology, order,
   orismology, patristic theology, phenomenological theology, phylum,
   physicotheology, place-names, place-naming, polyonymy, rationalism,
   religion, scholastic theology, secularism, soteriology, species,
   taxonomy, terminology, theology, toponymy, trinomialism