straight thrust vs knife thrust

straight thrust and knife thrust both are nouns.

Word	Noun	Adjective	Verb	Adverb
straight thrust	Yes	No	No	No
knife thrust	Yes	No	No	No

As nouns, knife thrust is a hypernym of straight thrust; that is, knife thrust is a word with a broader meaning than straight thrust:

straight thrust: (fencing) an attacking thrust made with one foot forward and the back leg straight and with the sword arm outstretched forward
knife thrust: a strong blow with a knife or other sharp pointed instrument

Other hypernyms of straight thrust include stab, thrust.

straight thrust (noun)	knife thrust (noun)
(fencing) an attacking thrust made with one foot forward and the back leg straight and with the sword arm outstretched forward	a strong blow with a knife or other sharp pointed instrument