Find:

а) синонимы

spacecraft, to call, artificial, significance, area, man-made, satellite, purpose, complicated, importance, space vehicle, explorer, aim, to guide, to offer, researcher, investigation, to incorporate, sophisticated, to propose, to determine, exploration, to define, to gather, to control, to collect, to name, to include, district, moon;

б) антонимы

special, upper, unmanned, natural, last, manned, unequal, conventional, distant, first, lower, civil, equal, inefficient, military, near, efficient, artificial.​

Profession veterinarian has a very long history.  In the early stages the attention to animal health was the basis of personal approach to cattle farmers, but over time humanity, united with medicine, resulted in a new and quite popular around the world, financially profitable and relevant profession veterinarian.The terms of the professional duties of the specialist treatment and prevention of animal diseases, as well as conducting various health and beauty treatments, including operations, veterinary and sanitary control in the production and sale of animal products. Здесь конечно не 15 предложений,но это все что смогла)

Англоса́ксы (англ. Anglo-Saxons,нем. Angelsachsen, дат. Angelsakser) — историки дают это названиегерманским племенам англов исаксов, к которым примкнули и юты. Эти племена, жившие между рекамиЭльбой и Рейном (область расселения саксов) и на Ютландском полуострове (область расселения англов и ютов), в середине V века, как и многие племена Северной Европы, скорее всего, в результате климатических изменений, начали переселяться в Британию.
The Anglo-Saxons (Eng. Anglo-Saxons, it. Angelsachsen, dates. Angelsakser) - historians give it nazvaniegermanskim tribes Angles Isaksen, who were supported and Utah. These tribes living between rekamiElboy and the Rhine (area of ​​settlement of the Saxons) and on the Jutland peninsula (area of ​​settlement of the Angles and Jutes), in the middle of the V century, and many tribes of Northern Europe, most likely as a result of climate change, began to settle in Britain.