old |əʊld| — past times (especially in the phrase `in days of old')

old-age |ˈəʊldˈeɪdʒ| — The latter part of life, the part of life after one's prime.

old-fashioned |əʊl ˈfæʃənd| — out of fashion

old-gold |ˈəʊldɡəʊld| — a brownish gold colour

old-hat |ˈəʊldhæt| — repeated too often; overfamiliar through overuse

old-maidish |əʊl ˈmeɪdɪʃ| — primly fastidious

old-time |ˈəʊl taɪm| — attractively old-fashioned (but not necessarily authentic)

old-timer |ˈəʊldˈtɑɪmər| — an experienced person who has been through many battles; someone who has given long service

old-world |ˈəʊld wɜːld| — characteristic of former times especially in Europe

olden |ˈəʊldən| — relating to time long past

older |ˈəʊldə| — advanced in years; (`aged' is pronounced as two syllables)

oldest |ˈəʊldɪst| — superlative form of old: most old

oldish |ˈəʊldɪʃ| — somewhat elderly

oldness  — the opposite of youngness

oldster |ˈəʊldstər| — an elderly person

oleaginous |ˌəʊlɪˈædʒɪnəs| — unpleasantly and excessively suave or ingratiating in manner or speech

oleander |ˌəʊlɪˈændər| — an ornamental but poisonous flowering shrub having narrow evergreen leaves and clusters of fragrant white to pink or red flowers: native to East Indies but widely cultivated in warm regions

oleaster |ɒlɪˈæstə| — any of several shrubs of the genus Elaeagnus having silver-white twigs and yellow flowers followed by olivelike fruits

oleograph |ˈəʊliːəɡræf| — (art) A type of chromolithograph, using oil paint on canvas, that attempts to imitate oil painting

oleomargarine |ˌəʊliːəʊˈmɑːrdʒərɪn| — a spread made chiefly from vegetable oils and used as a substitute for butter

olericulture |ˈɑːlərəkʌltʃər| — The field of horticulture dealing with the production, storage, processing and marketing of vegetables

oleum |ˈəʊlɪəm| — (inorganic chemistry) A solution of sulfur trioxide in sulfuric acid.

olfactory |ɑːlˈfæktərɪ| — of or relating to olfaction

olibanum |ɒˈlɪbənəm| — an aromatic gum resin obtained from various Arabian or East African trees; formerly valued for worship and for embalming and fumigation

olid |ˈɒlɪd| — (rare) evil-smelling; fetid.

oligarch |ˈɑːləɡɑːrk| — one of the rulers in an oligarchy

oligarchic |ˌɑːləˈɡɑːrkɪk| — of or relating to or supporting or characteristic of an oligarchy

oligarchical  — of or relating to or supporting or characteristic of an oligarchy

oligarchy |ˈɑːləɡɑːrkɪ| — a political system governed by a few people

olio |ˈəʊliːˌəʊ| — A rich, thick, Spanish stew consisting of meat and vegetables.

olivaceous |ˌɑːləˈveɪʃəs| — Having the color of a green olive.

olivary |ˈɑːlɪvəriː| — Shaped like an olive

olive |ˈɑːlɪv| — small ovoid fruit of the European olive tree; important food and source of oil

olive-branch |ˈɒlɪvbrɑːntʃ| — Used other than as an idiom: A branch of an olive tree.

olive-tree |ˈɒlɪv triː| — An evergreen tree, Olea europaea, that produces olives as fruit.

ology |ˈɑːlədʒɪ| — an informal word (abstracted from words with this ending) for some unidentified branch of knowledge

olympiad |əˈlɪmpɪæd| — one of the four-year intervals between Olympic Games; used to reckon time in ancient Greece for twelve centuries beginning in 776 BC

Olympian |əˈlɪmpɪən| — an athlete who participates in the Olympic games

Olympic |əˈlɪmpɪk| — of or relating to the Olympic Games

Olympics |əˈlɪmpɪks| — the modern revival of the ancient games held once every 4 years in a selected country

Olympus |əˈlɪmpəs| — a mountain peak in northeast Greece near the Aegean coast; believed by ancient Greeks to be the dwelling place of the gods (9,570 feet high)