theory; doctrine; opinion; view; rumour; rumor
authenticity; credibility
cavern; cave; cave system; grotto
ceiling; ceiling price; (price) ceiling
vast; extensive; immense; huge; large; grand
layer; stratum; class; stratum; sheaf; counter for stories (of a building)
above ground; on the ground; earth's surface; this world; this earth
to collapse; to crumble; to get out of shape; to lose one's shape; to break down; to be thrown into disarray; to crash (stock market)
to raise one's hand; to surrender; to raise one's hand to someone (as a threat to strike); to become better (at something); to improve; to throw one's hat in the ring
to challenge to (a fight, game, etc.); to throw down the gauntlet; to tackle (e.g. a problem); to attempt; to pressure (someone) for sex; to make advances to
formidable enemy; strong enemy; tough enemy
journey; trip; travels; during the journey; on the way; while travelling
to kill one's enemy (opponent)
war potential; military strength; fighting power; ability (to compete); capabilities; valuable asset
as (much) as possible; as (much) as one can; wherever practicable; if possible
to help each other; to cooperate
recommendation; endorsement
exchange (e.g. cultural); interchange; interaction; alternating current; AC
cooperation; collaboration
amateur; layman; respectable woman (i.e. not a prostitute, hostess, geisha); (arch.) unlicensed prostitute
combat; battle; action; active service; actual fighting
operation; management; handling; manipulating (to one's benefit); manipulation; influencing
to rise to the surface; to come to the front; to emerge (e.g. from obscurity); to stand out (e.g. against a dark background)
system; lineage; corollary; system (range of strata that correspond to a particular time period); (taxonomical) series
ordinary citizen; the general public
to wear (in modern Japanese, from the shoulders down); to put on; to bear (guilt, etc.)
(if) by some chance; by some possibility; in the unlikely event that; (unlikely event of) emergency; the worst(-case scenario)
to weave within (hair, fabric, etc.); to braid
to drain; to flow (unobstructed); to sell well; to be in good demand; to exit the stage; to remove (a prop) from the stage
qualitative difference; disparity; gap