CELTA- What do you need to consider when you are teaching vocabulary?

If you are teaching vocabulary, what linguistic traps do you have to anticipate so that your learners don’t fall into them? Here are some ideas from 00:00 Introduction 02:56 Problems with Meaning 03:13 #1 Multiple meanings 03:42 #2 Connotation 04:20 #3 Register 04:51 #4 Synonyms 05:46 #5 Homonyms 06:49 Problems with Form 07:11 #1 Spelling 07:34 #2 Plurals 08:08 #3 Count/ Non-count 08:34 #4 Irregular verbs 08:51 #5 Adjectives 09:14 #6 Collocations/ Colligation 10:47 Problems with Pronunciation 11:18 #1 Spelling 12:03 #2 Word stress 13:26 #3 Weak vowels 13:52 How much does all this matter?