I've stumbled upon a weird question which I'm forwarding here.

Player 1 casts Grinning Hunger. Its effect states that the opponent has to put either a creature or a shield into his graveyard. Note that the word "destroy" is nowhere to be seen.
Some people understood it as something that's above a mere "destroy", and that it would bypass Aqua Soldier's effect, for example, since he would technically never be destroyed.

Personally I think that in the case of creatures, being "put into graveyard" and "destroyed" are one and the same. But I would still like to hear the opinion of someone who is well versed in the weird parts of the ruleset.

Yes, put into graveyard = destroyed.

Also some cards in OCG Put cards into graveyard. If a card that puts cards to graveyard targets a regular creature, yes, that creature is counted as destroyed.

Yeah, even though it doesn't use the word destroy, the act of "putting a creature into a graveyard" is a "destroy", no matter what. Unlike other games, theres not even a confusing "sacrifice".

Thanks Yami. Actually someone found a page on the japanese wiki that says exactly that. I guess I'll paste it here.
https://www27.atwiki.jp/duel_masters/pages/89.html

Ah, right. The page linked from http://duelmasters.wikia.com/wiki/Destroy

I'll need to add more stuff from the jpwiki page onto it.