Very off topic (sorry Khaos, the guide is really neat!), but there are two parts to a hit: HOW it hits you, and WHAT it does when it hits you.
An attack can be a "hit" type (blockable, interacts with character green boxes, will not connect when the character is hit-invincible) or a "throw" type (unblockable, interacts with character blue boxes, will not connect when the character is throw invincible).
When it connects, it can either put you in hitstun (regular hits), or put you into thrown stun - a synced animation where you are attached to the thing that hit you.
A key thing about something that puts you into a synced animation is that it cannot be armored through, because it forcibly changes the state of the victim.
s.LP is a hit-type-attack that puts you in hitstun.
LP+LK is a throw-type-attack that puts you into thrown stun.
Nom is a hit-type-attack that places you into thrown stun.
Daisy Pusher is a throw-type-attack that places you into hitstun. (The 2nd hit is a hit-type-attack that places you into thrown stun.)
Excella is, in script, a hit-type-attack that makes itself hit you even on block if you are going upward, and places you into thrown stun.
All things are possible! And this is true in most game engines, at least all the older Capcom ones.
So, Nom is a hit-grab.