1) Agreed 2) Airline with a globe logo 3) All together 4) Allied 5) Amalgamate 6) Amalgamated 7) American airline 8) American Airlines rival 9) American rival 10) An American airline 11) As one 12) BBC television documentary 13) Came together 14) Characterized by unity 15) Close-knit 16) Coalesced 17) Cohesive Found on https://www.crosswordclues.com/clue/united
HMS United was a British Ursula Class submarine of 540 tons displacement launched in the early 1940s. She was armed with one small gun and six 21-inch torpedo tubes in the bow. She had a top speed of 11.25 knots surfaced and 10 knots submerged and carried a complement of 27. Found on http://www.probertencyclopaedia.com/browse/RU.HTM
made into or caused to act as a single entity: a united front. · formed or produced by the uniting of things or persons: a united effort. · agreed; in harmony. Found on https://www.infoplease.com/dictionary/united