RESPECTIVELY, with reverence.
RESPECTLESS, regardless.
RESPIRE, exhale; inhale.
RESPONSIBLE, correspondent.
REST, musket-rest.
REST, "set up one's—," venture one's all, one's last stake (from game of primero).
REST, arrest.
RESTIVE, RESTY, dull, inactive.
RETCHLESS(NESS), reckless(ness).
RETIRE, cause to retire.