How to cluster the similar texts in R

I know similar question might have asked in this/different forum but I feel my requirement is different. I have 2 columns dataframe as shown in below:

VerbatimLowestlevelTerm

Acute Bronchitis Acute Bronchitis

Sinusitis Maxillaris Acuta Acute Maxillary Sinusitis

Increase In Eosinophils Eosinophil Count Increased

Bronchitis Acuta Bronchitis Acute

Acute Sinusitis Maxillaris Acute Sinusitis, Maxillary

Eosinophil Increase Eosinophil Count Increased

Increase In Eosinophilia Eosinophilia

I am trying to get the below output with my code but I am not finding any luck

Verbatim LowestlevelTerm Cluster id

Acute Bronchitis Acute Bronchitis 1

Bronchitis Acuta Bronchitis Acute 1

Sinusitis Maxillaris Acuta Acute Maxillary Sinusitis 2

Acute Sinusitis Maxillaris Acute Sinusitis, Maxillary 2

Increase In Eosinophils Eosinophil Count Increased 3

Eosinophil Increase Eosinophil Count Increased 3

Increase In Eosinophilia Eosinophilia 3

Code which I am using to fulfil my requirement

new_df <- df %>%
  group_by(LowestlevelTerm) %>%
  summarise(Clusterid = toString(ID))

Could you please let me know if there any simple way to cluster this terms using any other functions?