shelter

defend, protect, safeguard, guard, shield, shelter, harbour

这些动词均有“保护、保卫”之意。
defend: 普通用词，指用武力或其它措施使人或物不受损害，消除危险。用作比喻时，指坚持某种行动、决定或意见。
protect: 普通用词，指用某种手段作为防御工具以防危险或伤害。
safeguard: 语气强，指采取积极措施预防可能发生的一切攻击或危险。
guard: 普通用词，指保持警惕以防可能的攻击或伤害。
shield: 语气比protect强，但侧重防止迫在眉睫的攻击或伤害。
shelter: 通常指寻找安全地方躲避风雨或使人免遭危害。
harbour: 贬义词，指隐匿或非法保护、窝藏。

protection, refuge, shelter

这些名词均含“保护、掩蔽(部)、庇护(所)”之意。
protection: 普通用词，指任何保护物。
refuge: 指避难所。
shelter: 趋向指临时性的。

名词 shelter:

1. a structure that provides privacy and protection from danger
2. protective covering that provides protection from the weather
3. the condition of being protected
   同义词：protection
4. a way of organizing business to reduce the taxes it must pay on current earnings
   同义词：tax shelter
5. temporary housing for homeless or displaced persons

动词 shelter:

1. provide shelter for
2. invest (money) so that it is not taxable

1. The refugees' main requirements are food and shelter.
   难民的主要必需品是食物和住所。
2. People were scrambling madly for shelter.
   人们疯了似的抢着往隐蔽处跑。
3. The spectators scuttled for shelter when it began to rain.
   一下起雨来，观众就纷纷找地方躲避。
4. They befriended the young girl, providing her with food and shelter.
   他们热心照顾这个年轻的姑娘，给她吃的，给她住处。
5. The rain sent everyone scurrying for shelter.
   这阵雨把大家浇得纷纷找地方躲避。
6. A place offering protection and safety; a shelter.
   避难所提供保护及安全的场所; 庇护所
7. These plants must be sheltered from direct sunlight.
   这种植物必须遮起来，免受阳光直射。
8. In the storm I took shelter under the tree.
   暴风雨时，我正在树下躲避。