What is the term for the study of the origin and history of words?

• Etymology:
• English Meaning: the study of the origin and history of words, or a study of this type relating to one particular word.
• Bengali Meaning: শব্দের উৎপত্তি ও ইতিহাসসংক্রান্ত বিজ্ঞান।

Other options:
• Syntax: the grammatical arrangement of words in a sentence
• Theology: the study of religion and religious belief
• Eulogy: a speech or piece of writing containing great praise, esp. for someone who has recently died.

Source: Cambridge & Accessible Dictionary.