HackerVoca

old : aged, elderly, ancient, antiquated, antique
old-fashioned : outmoded, antique, obsolete / / adjective
no longer useful because something newer and better has been invented: obsolete weapons | render sth obsolete (=make it obsolete): Current production methods will soon be rendered obsolete., archaic
ominous : foreboding
omnipresent : ubiquitous / adjective formal or humorous
seeming to be everywhere: We were tormented in the outback by the ubiquitous Australian fly.
ubiquitously adverb
ubiquity noun [uncountable]

only : sole, single, unique
operate : work, manage
operation : transaction noun formal

1 [countable] a business deal: The bank charges a fixed rate for each transaction. | financial transactions

2 [uncountable] the process of doing business: the transaction of his public duties

3 transactions [plural] discussions that take place at the meetings of a society, or a written record of these, business, affair