at the time of something—at the particular point of time:
Berth vs Birth
Berth refers to a ship’s dock space, a sleeping space, or a place for a vehicle to park.
Blush vs Flush
Blush, flush are comparable as verbs primarily when meaning to turn or grow red in the face and as nouns when meaning a turning or growing red in the face.
Benign vs Malignant
Benign means not dangerous, and malignant means life threatening.
At the start vs To start with
at the start—(also: at the beginning ) initially; at first:
Benevolence vs Malevolence
Benevolence means being inclined to do charitable acts.
Bluff vs Blunt vs Brusque vs Curt vs Crusty vs Gruff
Bluff, blunt, brusque, curt, crusty, gruff mean abrupt and unceremonious in speech or manner.
At the sight of someone vs In the sight of someone
at the sight of someone—on seeing a person:
Blossom vs Bloom vs Flower vs Blow
Blossom, bloom, flower, blow are comparable as verbs when meaning to become florescent and as nouns when meaning the period or state of florescence or (except for blow) meaning the florescent part itself.
At the side of sth vs On the side of sth
at the side of something—situated or placed beside smth.:
Benefactor vs Beneficiary
Benefactor refers to someone who provides a gift.
Bloody vs Sanguinary vs Sanguine vs Sanguineous vs Gory
Bloody, sanguinary, sanguine, sanguineous, gory are comparable when they mean affected by or involving the shedding of blood.