怪 vs 奇怪（近义词）

1)Both adjectives mean "unusual,extraordinary".Since they have different numbers of svllables,怪 is sometimes agglutinative,while 奇怪 can be used independently.
2)As an attributive,怪 is collocated with monosyllabic words,while 奇怪 needs to take the particle 的：
3)This shows that 怪 can qualify some nouns directly to form set phrases,e.g.怪人 (an eccentric), 怪天气(strange weather),怪腔怪调(speak in a queer way),etc

1)As the predicate,怪 often takes an adverb of degree,but 奇怪 does not have to:
2)In example①很怪 is used and the adverb of degree cannot be omitted;in example ②奇怪 is used(adverb of degree can be omitted )Both can take adverbs of degree as in example
3)In the following examples,only 奇怪 and not 怪 can be used:
4)This shows 奇怪 can be used independently in most cases.
5)怪 plus 了 also means"unexpected";and 了 is necessary:
6)怪 is also an adverb,meaning"very",which is entirely different from 奇怪.怪 is also a verb meaning"to blame'",and 奇怪 does not have such an usage at all.