By the narrowest of margins and By the skin of one's teeth

By the skin of one's teeth and by the narrowest of margins are semantically related In some cases you can use "By the skin of one's teeth" instead an adverb phrase "By the narrowest of margins".

By the narrowest of margins and by the skin of one's teeth are semantically related in only just topic. You can use "By the narrowest of margins" instead an adverb phrase "By the skin of one's teeth".