duplex

nouns

a house with two units sharing a common wall
an apartment having rooms on two floors that are connected by a staircase

verbs

change into a duplex
is a type of (narrower)
change the nature, purpose, or function of something
"convert lead into gold"; "convert hotels into jails"; "convert slaves to laborers"

adjectives

(used technically of a device or process) having two parts
"a duplex transaction"
is similar to
having or involving or consisting of more than one part or entity or individual
"multiple birth"; "multiple ownership"; "made multiple copies of the speech"; "his multiple achievements in public life"; "her multiple personalities"; "a pineapple is a multiple fruit"
allowing communication in opposite directions simultaneously
"duplex system"; "duplex telephony"
is similar to
reactive or functioning or allowing movement in two usually opposite directions
domain category
(often plural) systems used in transmitting messages over a distance electronically