beginning rhyme vs initial rhyme

beginning rhyme and initial rhyme both are nouns.

Word	Noun	Adjective	Verb	Adverb
beginning rhyme	Yes	No	No	No
initial rhyme	Yes	No	No	No

As nouns, beginning rhyme and initial rhyme are synonyms defined as:

beginning rhyme and initial rhyme: use of the same consonant at the beginning of each stressed syllable in a line of verse

Other synonyms of beginning rhyme include alliteration, head rhyme.

beginning rhyme (noun)	initial rhyme (noun)
use of the same consonant at the beginning of each stressed syllable in a line of verse	use of the same consonant at the beginning of each stressed syllable in a line of verse