On the other hand, the shared main entry for watershed has twenty-three words in CED but 93 in Cobuild .  And the word waterless is a main entry in Cobuild , explained in twenty words, whereas in CED it is naught but a so-called  undefined runon 'merely mentioned, but not explained explicitly, as a sub-entry at water .  So CED enters more items than Cobuild , but devotes less space to explaining them.
( ( On ( the ( other hand ) ) ) ( , ( ( ( ( ( ( the ( shared ( main entry ) ) ) ( for watershed ) ) ( has ( ( twenty-three words ) ( in ( ( ( CED but ) 93 ) ( in ( ( Cobuild . ) ( ( And ( ( the ( word waterless ) ) ( is ( ( ( ( a ( main entry ) ) ( in Cobuild ) ) , ) ( explained ( in ( twenty words ) ) ) ) ) ) ) ( , ( ( whereas ( ( ( ( in CED ) ( it ( is naught ) ) ) but ) ( ( a ( so-called ( undefined runon ) ) ) ( ` ( merely ( ( ( mentioned , ) ( but not ) ) ( ( ( ( explained explicitly ) , ) ( as ( a sub-entry ) ) ) ( at water ) ) ) ) ) ) ) ) . ) ) ) ) ) ) ) ) ) ) So ) ( CED ( ( ( ( ( enters ( more items ) ) ( than Cobuild ) ) , ) but ) ( ( devotes ( less space ) ) ( to ( explaining them ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN On) (NP (DT the) (JJ other) (NN hand))) (, ,) (S (NP (NP (DT the) (VBN shared) (JJ main) (NN entry)) (PP (IN for) (NP (NN watershed)))) (VP (VBZ has) (NP (NP (JJ twenty-three) (NNS words)) (PP (IN in) (NP (NP (NNP CED) (CC but) (NNP 93)) (PP (IN in) (NP (NP (NNP Cobuild) (. .)) (SBAR (FRAG (S (CC And) (NP (DT the) (NN word) (NNS waterless)) (VP (VBZ is) (NP (NP (DT a) (JJ main) (NN entry)) (PP (IN in) (NP (NNP Cobuild))) (, ,) (VP (VBN explained) (PP (IN in) (NP (CD twenty) (NNS words))))))) (, ,) (SBAR (IN whereas) (S (S (PP (IN in) (NP (NNP CED))) (NP (PRP it)) (VP (VBZ is) (ADJP (JJ naught)))) (CC but) (S (NP (DT a) (JJ so-called) (JJ undefined) (NN runon)) (VP (`` `) (ADVP (RB merely)) (VP (VBD mentioned)) (, ,) (CONJP (CC but) (RB not)) (VP (VBD explained) (ADVP (RB explicitly)) (, ,) (PP (IN as) (NP (DT a) (NN sub-entry))) (PP (IN at) (NP (NN water)))))))) (. .)))))))))) (IN So) (S (NP (NNP CED)) (VP (VP (VBZ enters) (NP (JJR more) (NNS items)) (PP (IN than) (NP (NNP Cobuild)))) (, ,) (CC but) (VP (VBZ devotes) (NP (JJR less) (NN space)) (PP (TO to) (S (VP (VBG explaining) (NP (PRP them)))))))) (. .)))
Cobuild uses more space to explain items but has fewer entries than CED.
( Cobuild ( ( ( ( uses ( more ( space ( to ( explain items ) ) ) ) ) but ) ( has ( ( fewer entries ) ( than CED ) ) ) ) . ) )
(ROOT (S (NP (NNP Cobuild)) (VP (VP (VBZ uses) (NP (JJR more) (NN space) (S (VP (TO to) (VP (VB explain) (NP (NNS items))))))) (CC but) (VP (VBZ has) (NP (NP (JJR fewer) (NNS entries)) (PP (IN than) (NP (NNP CED)))))) (. .)))