noun
A person who provides care, typically for the elderly, disabled, or chronically ill. Often used in healthcare and social welfare contexts.
祖母の介護者はとても親切です。
My grandmother's caregiver is very kind.
介護者の負担を減らすための支援が必要だ。
Support is needed to reduce the burden on caregivers.
看護師 is a licensed nurse, typically in a medical setting. 介護者 is a broader term for any caregiver, including family members and non-medical care workers.
Compound of 介護 (かいご, 'nursing, care') and 者 (しゃ, 'person').