No, the catechism should NOT speak of "adoration" in that context, but that's not because the body of the Lord is not to be adored.
Because only God is to be adored, there cannot be a similarity between the respect given to Scripture and the adoration given to the Lord's body. The catechism is saying because Scripture contains the words God has spoken, the Church shows respect for it (venerate) as the Church shows respect for the Lord's Body.
Adoration is higher than veneration, but adoration would imply veneration.
Should we adore the Lord's Body?
Yes. Christ is one Person, human and divine. We adore Christ in his humanity on account of the Word.
Damascene says (De Fide Orth. iv, 3): "On account of the incarnation of the Divine Word, we adore the flesh of Christ not for its own sake, but because the Word of God is united thereto in person." ... As stated above (Article 1) adoration is due to the subsisting hypostasis: yet the reason for honoring may be something non-subsistent, on account of which the person, in whom it is, is honored. And so the adoration of Christ's humanity may be understood in two ways. First, so that the humanity is the thing adored: and thus to adore the flesh of Christ is nothing else than to adore the incarnate Word of God: just as to adore a King's robe is nothing else than to adore a robed King. And in this sense the adoration of Christ's humanity is the adoration of "latria." Summa Theologiae, IIIa Q25 A2