Begin, commence, start, initiate, inaugurate are comparable when they mean to set something going or in progress or to take the first step in a course, process, or operation.
At one’s fingertips vs To one’s fingertips
at one’s fingertips —(of facts, information, etc.) readily available thanks to thorough knowledge (also: at one’s finger-ends):
Avalanche vs Landslide
An avalanche refers to snow, rocks, or other debris coming down a mountainside.
Autocracy vs Autonomy
Autocracy refers to a dictatorship.
Beg vs Entreat vs Beseech vs Implore vs Supplicate vs Adjure vs Importune
Beg, entreat, beseech, implore, supplicate, adjure, importune mean to ask or request urgently.
At one’s command vs Under one’s command
under one’s command—under smb.’s charge or control:
Before vs Ahead vs Forward
Before, ahead, forward are comparable when they mean in advance, especially in place or in time.
At one’s back vs On one’s back
Note: The expression does not correlate in meaning with the phrase on one’s shoulders—being smb.’s responsibility:
Authoritarian vs Authoritative
Authoritarian means requiring absolute obedience to authority.
Authentication vs Authentification
The correct spelling is authentication.
At one time and another vs At one time or another
at one time and another—from time to time; occasionally:
Because vs For vs Since vs As vs Inasmuch
Because, for, since, as, inasmuch as are the chief causal conjunctions in English.