Synonyms for Below (same or very similar meaning)
WordNet sense 1 (further down):
under
WordNet sense 2 ((in writing) see below):
infra
WordNet sense 3 (on a floor below):
downstairs, down the stairs, on a lower floor
WordNet sense 4 (in or to a place that is lower):
beneath, at a lower place, to a lower place
From the ODE community, based on WordNet
add/edit