addition; adding; supplement
occurring in succession; doing in succession; firing in rapid succession; volley of shots; volley (of questions, abuse, etc.); stream
lacking skill; uninspiring; unexciting; dull; unrefined; boring (from being too plain)
outside Earth's atmosphere; outer space; exoatmosphere; exo-atmosphere
to be dizzy; to be disoriented; to be dazzled; to be lost in (greed, lust, etc.)
same quality; same nature; homogeneous
all's grist that comes to his mill; turn everything to good account; turn anything to profit
perfect; ideal; completely satisfactory; leaving nothing to be desired; faultless; impeccable
singing one's own praises; praising one's own wares
understanding; comprehension
sinking; foundering; getting dead drunk; having too much fun (esp. in a red-light district, etc.) and missing work or neglecting one's duties; staying in one place for a long time
rotation (on an axis); rotation (under its own power)
revolution (of a celestial body around another)
global positioning system; GPS
sensory area (of the cerebral cortex); sensorial area
to cost little; to come cheap
trance; ecstasy; enthusiasm
transformer; trance (semi-conscious state); trance; trance music; trans; transgender
preliminary test or trial; tryout; workout; warm-up
uncharted territory; unknown waters; unfamiliar terrain
to drive on; to urge forward (e.g. cattle); to rouse (game from its cover); to press a tenant to leave; to evict
index; indices; indicator
I wish it were (so); may it be (so); I hope there is
four characters; four letters