1. constructive (vs. destructive), creative, formative, shaping, plastic, formative, inferential, reconstructive, rehabilitative, structural, positive

usage: constructing or tending to construct or improve or promote development; "constructive criticism"; "a constructive attitude"; "a constructive philosophy"; "constructive permission"

2. constructive, positive (vs. negative) (vs. neutral)

usage: emphasizing what is laudable or hopeful or to the good; "constructive criticism"

WordNet 3.0 Copyright © 2006 by Princeton University.
All rights reserved.

See also: constructive (Dictionary)