Segway vs Segway HT

Segway and Segway HT both are nouns.

Word	Noun	Adjective	Verb	Adverb
Segway	Yes	No	No	No
Segway HT	Yes	No	No	No

As nouns, Segway and Segway HT are synonyms defined as:

Segway and Segway HT: (trademark) a self-balancing personal transportation device with two wheels; can operate in any level pedestrian environment

Other synonyms of Segway include Segway Human Transporter.

Segway (noun)	Segway HT (noun)
(trademark) a self-balancing personal transportation device with two wheels; can operate in any level pedestrian environment	(trademark) a self-balancing personal transportation device with two wheels; can operate in any level pedestrian environment