2, 20-25, 20-30, 20's, 20s, 25-30, 40-45, 40-50, 40's, 40s, 45-50, 50-55, 50-60, 55-60, accessory, adult, advancement, apparel, assembly, associate, back-lit, backlit, builder, building, challenging, chatting, clothes, clothing, collaborating, colleague, color, colour, communicating, communication, concentrating, constructing, conversation, conversing, cooperation, daylight, daytime, demanding, dialog, dialogue, discussing, examining, exterior, eyeing, fellow, fifties, fifty, forties, forty, garment, gentleman, group, guy, hard hat, hat, head & shoulders, hearing, helmet, human, human being, listener, looking, luminous-vest, male, mid life, middle age, middle aged, middle-age, middle-aged, outdoor, outside, person, protection, safety vest, safety-hat, safety-vest, security, seeing, seriousness, solemn, somber, speaking, talker, team, toiling, torch, transit, transport, transporting, twenties, twenty, two, western european, work, worker,
