Synonyms for Man-to-man (same or very similar meaning)
WordNet sense 1 (extended senses; direct in means or manner or behavior or language or action):
directWordNet sense 2 (being a system of play in which an individual defensive player guards an individual offensive player):
one-on-oneWordNet sense 3 (being or characteristic of a single thing or person):
individual, singleFrom the ODE community, based on WordNetadd/edit