artificial
synthetic, fabricated, contrived, fake, mock, bogus, counterfeit, pseudo
conventional
traditional, historical, past; accepted, common, regular, routine, mainstream, ordinary
demand
request, claim, need, order, require, call for
decline
decrease, degeneration, drop, fall, recession, depression, reduction, slump, worsening
develop
evolve, advance, grow, improve, progress, flourish
difficulty
handicap, hardship, adversity, challenge, complication, dilemma, perplexity, plight, trouble
early
first, old, ancient, primitive, previous, former, remote
find
discover, come across, encounter, hit on, expose, notice, note, observe, recognize, spot, uncover...
