* நீலகிரி மரம் (Nilagiri maram): This literally translates to "Nilgiri tree," referring to the Nilgiri Hills where eucalyptus trees are commonly found.
* யூகலிப்டஸ் மரம் (Yugaliptaas maram): This is a direct transliteration of the English name.
* சீமை ஆல மரம் (Seemai aal maram): This means "foreign banyan tree," referring to its resemblance to the banyan tree, but being of foreign origin.
* சீமை இலுப்பை (Seemai iluppa): This means "foreign illippai," referring to its resemblance to the illippai tree, but being of foreign origin.
The most appropriate name depends on the context and the specific type of eucalyptus being referred to.