Sellotape vs adhesive tape

Sellotape and adhesive tape both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sellotape	Yes	No	No	No
adhesive tape	Yes	No	No	No

As nouns, adhesive tape is a hypernym of Sellotape; that is, adhesive tape is a word with a broader meaning than Sellotape:

Sellotape: transparent or semitransparent adhesive tape (trade names Scotch tape and Sellotape) used for sealing or attaching or mending
adhesive tape: tape coated with adhesive

Sellotape (noun)	adhesive tape (noun)
transparent or semitransparent adhesive tape (trade names Scotch tape and Sellotape) used for sealing or attaching or mending	tape coated with adhesive