sword (esp. a large, double-edged one); blade; bayonet; swordsmanship; stinger; ovipositor
peak period; pinnacle; prime; zenith; glory days
to approach; to draw near; to get close; to get acquainted with; to get closer to; to get to know
expedition; (military) campaign; tour (by a sports team, performer, etc.); visit
black with hints of blue (as in a bruise); bluish black
on board a ship; aboard a ship
death rate; mortality rate
doubt; question; uncertainty; skepticism; scepticism; suspicion
plan; device; idea; design; contrivance; conception
six; six years of age; six o'clock (old time system)
to reason; to sum up; to conclude
afterwards; at a later time; later on; after some time
hygiene; sanitation; health
lading; loading; carrying
rhyme; lime (tree, fruit) (Citrus aurantifolia); lime (mineral)
Nobel Prize in Physiology or Medicine
ageing; aging; senile deterioration
guinea pig (Cavia porcellus); subject of an experiment; (human) guinea pig
bat (Chiroptera spp.); umbrella; opportunist; turncoat
innumerable; countless; numberless
in addition; furthermore; above (which); on top of (which)