pull back vs pull in one's horns

pull back and pull in one's horns both are verbs.

Word	Noun	Adjective	Verb	Adverb
pull back	No	No	Yes	No
pull in one's horns	No	No	Yes	No

As verbs, pull back and pull in one's horns are synonyms defined as:

pull back and pull in one's horns: make a retreat from an earlier commitment or activity

Other synonyms of pull back include back away, back out, crawfish, crawfish out, retreat, withdraw.

pull back (verb)	pull in one's horns (verb)
make a retreat from an earlier commitment or activity	make a retreat from an earlier commitment or activity
move to a rearward position; pull towards the back
stretch back a bowstring (on an archer's bow)
use a surgical instrument to hold open (the edges of a wound or an organ)
pull back or move away or backward