mechanisation vs high tech

mechanisation and high tech both are nouns.

Word	Noun	Adjective	Verb	Adverb
mechanisation	Yes	No	No	No
high tech	Yes	No	No	No

As nouns, high tech is a hypernym of mechanisation; that is, high tech is a word with a broader meaning than mechanisation:

mechanisation: the act of implementing the control of equipment with advanced technology; usually involving electronic hardware
high tech: highly advanced technological development (especially in electronics)

Other hypernyms of mechanisation include high technology.

mechanisation (noun)	high tech (noun)
the act of implementing the control of equipment with advanced technology; usually involving electronic hardware	highly advanced technological development (especially in electronics)
the condition of having a highly technical implementation