seizing vs clutches

seizing and clutches both are nouns.

Word	Noun	Adjective	Verb	Adverb
seizing	Yes	No	No	No
clutches	Yes	No	No	No

As nouns, clutches is a hyponym of seizing; that is, clutches is a word with a more specific, narrower meaning than seizing:

seizing: the act of gripping something firmly with the hands (or the tentacles)
clutches: the act of grasping

Other hyponyms of seizing include clasp, clench, clutch, grasp, grip, hold.

seizing (noun)	clutches (noun)
the act of gripping something firmly with the hands (or the tentacles)	the act of grasping
small stuff that is used for lashing two or more ropes together