Synonyms for Schizoid (same or very similar meaning)
WordNet sense 1 (characterized by symptoms similar to but less severe than schizophrenia):
schizotypal personalityWordNet sense 2 (of or relating to or characteristic of schizophrenia):
schizophrenicWordNet sense 3 (affected with emotional disorder):
neurotic, psychoneuroticFrom the ODE community, based on WordNetadd/edit